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Author
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Topic: I want the whole breakdown of the 6 to 8 swap!
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DC65inlines
Journeyman Posts: 27
From: Nevada
Registered: Oct 2000
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posted 12-20-2000 10:27 AM
   
Can anyone here tell me exactly what to do to my mustang 6 to support a 302.I'm mostly looking for suspension changes. What to change to last a while. Thanks! ------------------
DC65inlines [OOOOOO)http://www.geocities.com/dc65inlines/Newsite.html
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65coupei6
Gearhead Posts: 140
From: S.F., CA
Registered: May 2000
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posted 12-20-2000 12:06 PM
I am not an expert but I'd say the steering to support the new spindles for your 5-lug brakes (which is a must). Your current springs and arms should be ok. Then you would have to get rid of the 7.5" rear. New bellhousing and rebuild your tranny. Did I miss anything?
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Fastback68
Gearhead Posts: 115
From: Sucat, Paranaque, Philippines
Registered: Jul 99
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posted 12-20-2000 12:40 PM
The engine mounts are also different. I've been in the Mustang business for a very short time, so I've not come across a broken engine mount, but I understand they happen, so get the right ones.
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fordfan
Gearhead Posts: 1717
From: Walla Walla, Wa, USA
Registered: Jun 99
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posted 12-20-2000 01:52 PM
Front spindles (Spindle to Drum)Entire front Steering (Except: Strut Rods, and Sway Bar (though, I would suggest a larger one.). Front Springs Motor Mounts (Tranny mount may need modified depending on year of car and the year of the Engine/tranny). Rear Axle Driveline.
Trans and Motor (Tranny is dependant on year and original Engine size (250CI 6-cyls used the same Trans as a V-8) Thats about all I can think of.. ------------------
*WARNING: RATED MA for Mature Audiences only!* Joseph J Shaffer IV
Walla Walla, WA
MustangsandMore Member# 37
'68 Mustang Coupe, 2.79 gears.
'64 Mercury Comet, 2.80 gears
'62 Ford Falcon 2dr Wagon
'43 Dodge WC-53,FACTORY 5.83 gears i belive!
'41 Chevy Pickup, No rear, no gear!
'70 Chevy Pickup Heh, and you think Sam needs Gears?!
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sigtauenus
Gearhead Posts: 594
From: Lemoore, CA
Registered: Jun 2000
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posted 12-20-2000 02:40 PM
Also need the crossmember that goes from shock tower to shock tower and crosses below the oil pan.If you need one I'll send it FREE, I have two extras and don't need them.
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amartin725
Journeyman Posts: 9
From: Attleboro, MA
Registered: Nov 2000
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posted 12-20-2000 04:00 PM
Gee DC, and you want us inline guys to forgive you and this is what you go and do?  Anyway, definitely above all else upgrade the brakes. Don't forget that you'll also need the accelerator pedal assembly from a V8, a V8 radiator, exhaust system......the list goes on. Al ------------------
Turd's Rule!!
200/3-spd
"200 & 250 Head Under the Knife"
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I65Stang
Pit Boss Posts: 1698
From: Antelope, CA
Registered: Jun 99
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posted 12-20-2000 10:04 PM
Just a few more things to add real quick (I have a complete list somewhere and will try to find it this weekend): Fuel lines (I6 comes out in the wrong place), wiring, maybe brake lines (if using a bigger rear end) and emergency brake stuff. Dont forget about the cost of rims for 5 lugs and tires, etc going along with them. And yes, there is more but this will do for now :>).------------------
Tim
M&M Member #35
1965 Mustang coupe, 200 ci w/ a Holley 2300, Clifford header, and true duals w/ 26" Smithys
1988 Mustang GT vert, totally stock for now
http://all.at/mustang
https://mustangsandmore.com/ubb/I65Stang.html
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mellowyellow
Gearhead Posts: 788
From: So. Fl.
Registered: Aug 2000
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posted 12-20-2000 10:05 PM
Also, the gasline is different. The 8 cyl comes into the engine compt. on driver side along the frame, through the apron, and to the fuel pump. Also, 66 motor mount brackets are a better way to go. If you get a V-8 8" rear, you will need to get the correct driveshaft.
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Ralph Rebandt
Gearhead Posts: 155
From: Farmington Hills, MI
Registered: Feb 2000
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posted 12-22-2000 01:15 AM
fellas, i am in the process of the swap. changing the coil springs scared the heck out of me. at one point, i said, "well, if it comes undone and shoots though my chest, at least i am ready to meet the Lord!" But here is my question...WHAT DO I NEED TO DO FOR THE DRIVE SHAFT AND THE GAS LINES? I WASN'T AWARE OF THOSE ISSUES... as always, thanks a ton...ralph
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I65Stang
Pit Boss Posts: 1698
From: Antelope, CA
Registered: Jun 99
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posted 12-22-2000 01:24 AM
The V8 fuel lines come out closer to the radiator (towards the side of the engine) instead of our I6 ones which come out by the firewall. You cant use the I6 one as its too far away from the carb and interfers with the exhaust (gas gets too hot too). As for driveshaft, I have been told its all a matter of what parts you end up using for the rear end, tranny, etc but yokes will have to be changed, etc. I will leave the driveshaft answer to those who know more :>).I hope you were using a spring compressor... ------------------
Tim
M&M Member #35
1965 Mustang coupe, 200 ci w/ a Holley 2300, Clifford header, and true duals w/ 26" Smithys
1988 Mustang GT vert, totally stock for now
http://all.at/mustang
https://mustangsandmore.com/ubb/I65Stang.html
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sigtauenus
Gearhead Posts: 594
From: Lemoore, CA
Registered: Jun 2000
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posted 12-22-2000 11:35 AM
I think with the driveshaft its a matter of what size u-joints you will need, based on what rear-end you have or put in. If you had a C-4 or 3spd behind the 6 cyl, the splines on the yoke will still fit if you put a C-4 or 3,4 spd behind the v-8. The problem is if you change the rear end and the pinion yoke requires a bigger u-joint than the previous pinion yoke did, so in turn you will need a thicker driveshaft or have a shop weld new ends to your existing driveshaft. clear as mud?
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steve'66
Gearhead Posts: 1338
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 12-22-2000 01:22 PM
It sure sounds like the best option is to sell the 6 cyl car and buy a v-8 model SteveW
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66351stang
Gearhead Posts: 348
From: sayville,newyork
Registered: Jul 2000
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posted 12-22-2000 02:52 PM
hipo your 6cyl, with the right build up you can have your self a good running car. 
my friend has a 66 galaxie with a worked 6cyl
last summer he turned a best time of 13.02
the car wiegh's somewhere around 3,200lbs
engine is in the mitts of going into a 65 stang.hoping for 12.80's next summer on pure motor.. or go to a v-8 car as was stated..------------------
ponycar66,have you flown in a ford latley???????
66-COUPE W/351SVO
glad i had a v-8 !!!!!!
84.5 gt350-61 falcon 302
have a great day!!!!!!!!
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AKBOSSMAN
Gearhead Posts: 162
From: WASILLA , AK USA
Registered: Oct 2000
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posted 12-22-2000 05:05 PM
V-8 cars aren't that pricey in some places. I don't think I would convert a coupe or conv. But if it's a 2+2 buy a coupe or conv with a I-6 and trade parts and resell the other car walla! ------------------
WAYNE CURTIS WASILLA AK
70 GRABBER GREEN BOSS 302
65 PRARIE BRONZE 2+2 289
92 SHELBY 4X4 (K-9 IDITAROD LEAD DOG)
92 DODGE CLUB CAB CUMMINS TURBO DIESEL 6X6
http://www.volstate.net/~blackoak/stormwatch.html
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fordfan
Gearhead Posts: 1717
From: Walla Walla, Wa, USA
Registered: Jun 99
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posted 12-22-2000 05:40 PM
Gee, you guys are sure blowing this Swap out of Porportion!  On my Comet, I'm to the Point, where I need to Spend the dough to Get a Front Susp Rebuild kit. ------------------
*WARNING: RATED MA for Mature Audiences only!* Joseph J Shaffer IV
Walla Walla, WA
MustangsandMore Member# 37
'68 Mustang Coupe, 2.79 gears.
'64 Mercury Comet, 2.80 gears
'62 Ford Falcon 2dr Wagon
'43 Dodge WC-53,FACTORY 5.83 gears i belive!
'41 Chevy Pickup, No rear, no gear!
'70 Chevy Pickup Heh, and you think Sam needs Gears?!
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Bob429
Gearhead Posts: 201
From: Watervliet,MI,USA
Registered: Jun 99
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posted 12-22-2000 05:53 PM
The 8 cyl models also had torque boxes .
I don't think the 6 cyl's did. But does it make much of a difference?  ------------------
Bob
Member#39
71 J code
429 SCJ-R Sportsroof
C6 4:11
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Mike65
Gearhead Posts: 153
From: columbia,NJ, USA. 65 fastback. MCA #-04549
Registered: Dec 2000
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posted 12-22-2000 10:50 PM
dc65inlines, dont let them scare you. there is a lot to be changed to do the 6-V8 swap, but if you take your time & not rush things you will get it done. I'm in the process of restoring a 6cyl 65 2+2 & as i'm going along with the resto when I come upon parts to replace during the resto that have to be converted for the V8 I'm changing them at that time. Works for me. Remeber dont rush it.
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mellowyellow
Gearhead Posts: 788
From: So. Fl.
Registered: Aug 2000
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posted 12-23-2000 12:14 AM
Neither the 65-66 coupes or fastbacks had torque boxes at all. either 6 or 8
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66351stang
Gearhead Posts: 348
From: sayville,newyork
Registered: Jul 2000
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posted 12-23-2000 08:17 AM
mike hit it on the head what ever project
you do,take your time and make it right..
it took me 3 years,and i am still doing little nit picking thing's..
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ponycar66,have you flown in a ford latley???????
66-COUPE W/351SVO
glad i had a v-8 !!!!!!
84.5 gt350-61 falcon 302
have a great day!!!!!!!![This message has been edited by 66351stang (edited 12-23-2000).]
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Ralph Rebandt
Gearhead Posts: 155
From: Farmington Hills, MI
Registered: Feb 2000
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posted 12-23-2000 10:39 AM
AKBOSSMAN commented that he would not do the swap on a convertible...why? is there something impossible with doing it? That is what I have, and am in the process of diong it. Also, I understand the issue of fitting the drive shaft now, but what about the gas line?Where do I get a "new" of different one? The junk yard, an auto parts store? How far does the gas line go back - to the gas tank? What about the question raised on the gas pedal linkage? What do I have to change on that? (PS I did have a spring compressor, but it still scared the heck out of me. I was afraid the bolts on the compressor would snap)
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mellowyellow
Gearhead Posts: 788
From: So. Fl.
Registered: Aug 2000
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posted 12-23-2000 11:32 AM
Have done this deal a couple times. Both Cvt. I took a 67 cyl cvt, 3 spd and changed it to a 289. c-4, adding ps,pdb,tilt, FacAC. A 67 Cougar gave it up. It is easier and more cost effective to have a donor car. Had the Cougar not appeared, it wouldn't have been a do. I sold the remains to a Cougar guy. The only down side to this project is the fact that the car still has 6 cyl. nos. Even then, I had to buy a v-8 driveshaft as the Cougar wouldn't work.
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mellowyellow
Gearhead Posts: 788
From: So. Fl.
Registered: Aug 2000
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posted 12-23-2000 12:59 PM
Forgot something. The throttle is different because of the location of the throttle rod. The 6 and V-8 are in a different position. Each design is different. That particular car ended up in Switzerland. The owner loved it except for the 2:79 gear. It didn't do well in the Alps. They ordered new gears in the US.
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Amherst
Gearhead Posts: 154
From: Amherst, WI, USA
Registered: Aug 2000
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posted 12-23-2000 03:51 PM
If you are going to stick with the C-4 that is in there, can't you just get an 8 inch rear and drive shaft from a V-8 65 or 66? I guess it all comes down to the motor you will be running. Just a thought. Has anyone run an 8 inch rear with the Powertrax locker or limited slip? For low hp motors, wouldn't that be sufficient with new ring and pinion in the 8 inch? I am in the same boat and holding out for a 9 inch once the swap meets start in the spring.
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Mike65
Gearhead Posts: 153
From: columbia,NJ, USA. 65 fastback. MCA #-04549
Registered: Dec 2000
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posted 12-23-2000 11:21 PM
Hey Ralph,
As far as the fuel line you ned to replace for your 6cyl-V8 swap try contacting a co. called classic tube. They manufacture pre-bent tubing. their web site is www.classictube.com, phone # is 716-759-1800, & the adress is 80 rotech dr lancaster Ny 14086. Took some doing but I hope this helps you out. All these people say to forget the 6cyl-V8 swaps, but isnt that what hot rodding is all about. Good w/your project. Im doing one also on a 65 2+2.
------------------
Mike & Robin MCA#-04549
65 Fastback
99 Explorer Sport
96 Ranger
87 Crown Vic
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mellowyellow
Gearhead Posts: 788
From: So. Fl.
Registered: Aug 2000
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posted 12-24-2000 02:21 PM
I have a 3;00 limited slip in my 65 Cvt. It's a weak ratio but it works well behind a built motor. I have another. A 3:50 limited slip 8" center that I'm going to use in a EFI conversion- 68. Articles say that they are good up to 300 hp. and that they are strong. There are some differences in a c-4 between a 6cyl and a V-8.
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