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  '64 1/2 to '73 -- The Classic Mustang
  switching out a 289 to a 351w

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Author Topic:   switching out a 289 to a 351w
FloJoe
Gearhead

Posts: 575
From: Port Orange, FL, USA
Registered: Dec 2000

posted 06-28-2001 01:36 AM     Click Here to See the Profile for FloJoe   Click Here to Email FloJoe     Edit/Delete Message   Reply w/Quote
What would I have to change/modify when changing over from a 289 to a 351w?? (I have a C-4 tranny also.)

------------------
Joe Fields
68 Fastback 289ci bored .030 over
C-4
"Never play leapfrog with a unicorn."

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richard bohm
Gearhead

Posts: 373
From: tucson,az-luray,va
Registered: May 2001

posted 06-28-2001 02:36 AM     Click Here to See the Profile for richard bohm   Click Here to Email richard bohm     Edit/Delete Message   Reply w/Quote
this is essentially a bolt in swap. you use the 66-70 motor mounts,a set of swap headers from hedman, short or long your choice. the stock C4 bolts in place though you need the 157 tooth flywheel. you may need a hood scoop if you are using a taller than stock intake. use a radiator designed for a 69 mustang, its wider. you also want a least a 3 core radiator or a good aluminum one.

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69maverick
Moderator

Posts: 1440
From: Thomaston,CT.
Registered: Jan 2001

posted 06-28-2001 06:54 AM     Click Here to See the Profile for 69maverick   Click Here to Email 69maverick     Edit/Delete Message   Reply w/Quote
Wouldn't the flywheel be the same on both motors ?

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Tom351
Journeyman

Posts: 93
From: Marietta,GA
Registered: Mar 2001

posted 06-28-2001 10:23 AM     Click Here to See the Profile for Tom351   Click Here to Email Tom351     Edit/Delete Message   Reply w/Quote
My 351 used the 289 flywheel (69 351 block)
This topic came up a while back, here is a link to it
https://mustangsandmore.com/ubb/Forum1/HTML/004239.html

I was also able to use hedman 289 headers, I did the swap before the 351 swap headers were available so I would recommend the swap headers, but if you already had some for the 289, you may want to try them.

I had to modify the alternator bracket etc... because the 351 crank pulley uses 4 bolts unlike the 3bolt 289, and the 351 balancer stuck out farther. Although maybe I could have used the 289 balancer?

------------------
67 Fastback - Arctic White Pearl paint
351W ,Trick Flow Aluminum Heads, Edelbrock TorkerII, Carter 750 CFM, Comp. Cam 477/510 219/[email protected], Performance Automatic C-4 Trans, 3.55 gears, Front Disc Brakes, 1-1/8" Fr. 3/4" rear sway bars.

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steve'66
Gearhead

Posts: 8796
From: Sonoma,CA,USA
Registered: Mar 2000

posted 06-28-2001 10:24 AM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by 69maverick:
Wouldn't the flywheel be the same on both motors ?

It was on mine.

I did this swap in the '66 last year. Using a performer rpm intake/750 holley, the stock hood cleared using a drop based aircleaner.

Some of your existing 289 goodies will not fit the 351w. The intake, distributor, and oil pan are larger. Good luck,

SteveW

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74merc
Gearhead

Posts: 956
From: Demopolis AL
Registered: Jun 99

posted 06-28-2001 04:20 PM     Click Here to See the Profile for 74merc   Click Here to Email 74merc     Edit/Delete Message   Reply w/Quote
the flywheel will work fine.
the balance is the same, and the flywheel size and tooth count depends on the tranny bellhousing and starter placement more than anything else.
btw, longtubes rock

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FloJoe
Gearhead

Posts: 575
From: Port Orange, FL, USA
Registered: Dec 2000

posted 06-28-2001 05:17 PM     Click Here to See the Profile for FloJoe   Click Here to Email FloJoe     Edit/Delete Message   Reply w/Quote
So the drivetrain would be a-ok?

------------------
Joe Fields
68 Fastback 289ci bored .030 over
C-4
"Never play leapfrog with a unicorn."

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steve'66
Gearhead

Posts: 8796
From: Sonoma,CA,USA
Registered: Mar 2000

posted 06-28-2001 05:37 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
Drivetrain will fit fine, as long as it can take to new h.p. and torque.
What heads/cam and compression are you gonna run in the 351w?

SteveW

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FloJoe
Gearhead

Posts: 575
From: Port Orange, FL, USA
Registered: Dec 2000

posted 06-29-2001 12:51 AM     Click Here to See the Profile for FloJoe   Click Here to Email FloJoe     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by steve'66:
Drivetrain will fit fine, as long as it can take to new h.p. and torque.
What heads/cam and compression are you gonna run in the 351w?

Well I'm still in the process of finding one. I'm probly gonna run it stock or however the motor is when I get it. I'm a poor teenager So not much cash to work with.

------------------
Joe Fields
68 Fastback 289ci bored .030 over
C-4
"Never play leapfrog with a unicorn."

[This message has been edited by FloJoe (edited 06-29-2001).]

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steve'66
Gearhead

Posts: 8796
From: Sonoma,CA,USA
Registered: Mar 2000

posted 06-29-2001 09:57 AM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
FloJoe,

Your drivetrain will be fine.


SteveW

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66351stang
Gearhead

Posts: 711
From: sayville,newyork
Registered: Jul 2000

posted 06-29-2001 12:27 PM     Click Here to See the Profile for 66351stang   Click Here to Email 66351stang     Edit/Delete Message   Reply w/Quote
the swap is an easy one, my set up is a 351w with and modified c-4, i used the shorty headers because i didn't want that stupid steering extender, everything worked out fine..

------------------
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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FloJoe
Gearhead

Posts: 575
From: Port Orange, FL, USA
Registered: Dec 2000

posted 06-30-2001 12:04 AM     Click Here to See the Profile for FloJoe   Click Here to Email FloJoe     Edit/Delete Message   Reply w/Quote
Since I am looking for one, and I'm poor
Could you guys keep an eye out for a cheap running 351w?

------------------
Joe Fields
68 Fastback 289ci bored .030 over
C-4
"Never play leapfrog with a unicorn."

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richard bohm
Gearhead

Posts: 373
From: tucson,az-luray,va
Registered: May 2001

posted 07-02-2001 03:09 AM     Click Here to See the Profile for richard bohm   Click Here to Email richard bohm     Edit/Delete Message   Reply w/Quote
search the wrecking yards under the hoods of 73 and later trucks and vans. many of them had the 351w.

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