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Author
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Topic: Need help with ID
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MidLifCrisis
Gearhead Posts: 466
From: Frederick County, MD
Registered: Oct 2001
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posted 11-03-2004 08:25 PM
   
A buddy has a big block '69 Ranchero. We always assumed that it was a 390, but a mechanic suggested that it may be a Merc 410 or 390 GT. The exhaust manifold looked different than usual. The # on the manifold is C70E-9431A. Can anyone tell what it is from this? Thanks, Charlie
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Mooney
Gearhead Posts: 1580
From: Marietta, Ga
Registered: Oct 2003
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posted 11-03-2004 08:30 PM
67 Fairlane isn't it???But thats just the C7OE part, the rest I dunno. Sorry about that.
Well, this site right here says;
http://www.perogie.com/NOSExhaustmanifolds.htm
That its a 390 GT manifold.
[This message has been edited by Mooney (edited 11-03-2004).]
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Fastback68
Gearhead Posts: 3093
From: Sucat, Paranaque, Philippines
Registered: Jul 99
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posted 11-03-2004 11:16 PM
C7OE-9431A manifolds (that's an O, not a 0) were used for 390s in ?67-8 Mustangs, Cougars, Fairlanes and Comets up to 2/15/68. Am I impressive, or is it Google??? 
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Mooney
Gearhead Posts: 1580
From: Marietta, Ga
Registered: Oct 2003
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posted 11-04-2004 05:03 AM
Now what website did you get all that info from!?!? Cause I did the same thing!
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MidLifCrisis
Gearhead Posts: 466
From: Frederick County, MD
Registered: Oct 2001
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posted 11-04-2004 06:21 AM
Thanks guys...yes you are impressive.(what web-site?) Charlie
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Fastback68
Gearhead Posts: 3093
From: Sucat, Paranaque, Philippines
Registered: Jul 99
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posted 11-04-2004 07:54 AM
Here ya go guys. I usually have a lot of success Googling part numbers.
http://www.ford-trucks.com/forums/archive/index.php/t-65866
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68 S-code GT
Gearhead Posts: 2518
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 11-04-2004 10:25 AM
That?s the left exhaust manifold, right? It is for 67-9 390s in Mustangs, Cougars, Fairlane, etc.------------------
Ed S. 68 S-code FB GT 4spd(now C6)/3.25 PS PDB
68 J-code(now 289) Cp Sprint"B" C4/3L00-9" PDB PS AC
99 F150 XLT Ext/cab, 4X4, 5.4L, 3L55
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MidLifCrisis
Gearhead Posts: 466
From: Frederick County, MD
Registered: Oct 2001
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posted 11-05-2004 07:19 PM
68 S-code, yes it is the driver's side.So how would you determine if it is a 390, 390GT, or 428? Charlie
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Fastback68
Gearhead Posts: 3093
From: Sucat, Paranaque, Philippines
Registered: Jul 99
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posted 11-05-2004 09:54 PM
Well, for that you need to ratchet up your method of testing. Here's an exchange I copied down a while back, somewhere here on M&M. I believe GUY 1 was Alex ...GUY 1: George, the easiest way to spot a 428 with the heads on is by the exhaust manifold bolt pattern. All 428's have 4 bolts per exhaust port. Some 390 GT's also have similar layouts but the ports are much smaller than the 428. GUY 2: This is only true for the CJs.The standard 428s only had the regular 2 bolt pattern on each port. GUY 3: Thats right, the big car 428`s used the same heads as the 390`s. Easiest way to check for a 428 is to do a stroke check, with a wire, or screwdriver in the spark plug hole. Put #1 cyl. on TDC, stick the wire/screwdriver in the plug hole, & make a mark where it touches the bottom of the valve cover flange, Now, slowly turn the engine 1/2 a turn, untill the piston won`t drop any lower, then make another mark. Measure the distance between the marks. 352& 360`s will be 3 1/2"`s. 390 will be 4 3/4"`s, & a 410-428 will be roughly 4"`s.
[This message has been edited by Fastback68 (edited 11-05-2004).]
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Fastback68
Gearhead Posts: 3093
From: Sucat, Paranaque, Philippines
Registered: Jul 99
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posted 11-05-2004 09:57 PM
You could also check the VIN, if the engine is original. From memory, a 390 would be a "Z" code and a 428 would be a "Q" code. At least that's true for 66 Thunderbirds.
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68 S-code GT
Gearhead Posts: 2518
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 11-05-2004 11:28 PM
I think that is the right manifold for his car. Aren?t the dampener and flywheels on the 410 and 428 different than a 390? By this I mean balanced differently.------------------
Ed S. 68 S-code FB GT 4spd(now C6)/3.25 PS PDB
68 J-code(now 289) Cp Sprint"B" C4/3L00-9" PDB PS AC
99 F150 XLT Ext/cab, 4X4, 5.4L, 3L55 [This message has been edited by 68 S-code GT (edited 11-05-2004).]
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Rory McNeil
Gearhead Posts: 1542
From: Surrey, B.C. Canada
Registered: Nov 2000
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posted 11-06-2004 01:31 AM
Although the 410 & 428`s do have different Flywheels & flexplates (these are the only FE big blocks that are externally balanced, so they have weight welded onto the flexplate, or cast in to the flywheel). However, the balancers are still neutral balanced, & are the same as a 390. The only exception is the 428 SUPER Cobra Jet. Due to the added weight of the LeMans "capscrew" rods, these engines have a counterweight cast into the spacer behind the damper. All other FE`s use a round, un weighted spacer. The SCJ crank (casting numbers 1UA) are also different, as they are lacking the small counterweight cast into the center of the crank. The 410 & non SCJ have this "wing" shaped counterweight. The EASIEST way to do a stroke check on a FE, is to put #1 cyl at TDC, pull #1 & 4 spark plugs, install a straight solid item (chopstick, knitting needle, metal rod etc) into #1 cyl. until it hits the top of the piston. Make a mark at the valve cover flange. Now, do the same thing using #4 cyl. (which is at BDC). Compare the marks, & thats your stroke. 352-360 is 3.5", 390-406 is 3.78, 410-428 is 3.98". If by chance you end up at 3.30", you have a 332 from 58 or 59 (although the 332 was used in Canada in 60 & 61 as well)------------------
78 Fairmont 428 4 speed 10.20@130mph
80 Fairmont 302 5 speed 12.8@105mph
85 Mustang NHRA M/Stock 302 5speed. [email protected]
59 Meteor (Canadian Ford) 2 dr sedan 332, auto
74 F350 ramp truck 390 4spd
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MidLifCrisis
Gearhead Posts: 466
From: Frederick County, MD
Registered: Oct 2001
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posted 11-06-2004 10:50 AM
You guys are great. Thanks. I will pass this on. Charlie
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