351 windsor in Fox mustang??? - Ford Mustang Forum

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post #1 of 8 (permalink) Old 02-12-2007 Thread Starter
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Location: Rockingham County
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Question 351 windsor in Fox mustang???

Looking to build up a 351W for now, basically get as many ponnies as possible but still keep it steet worthey and practical (not talking about gas ). Anyway I was originally gonna go for a classic mustang, but then I realized that it's a pain to find rollers in decent shape and standard transmission!!! So now I figure a fox body is the way to go. Plus I wouldn't feel as bad about having to put a roll cage in one and do any hacking/welding that may become necassary. I could build up a 302, but since the prices for stuff is all the same for a 351W I figure I mine as well give myself the displacement if I'm going to do the work....

Basically my question is this: Will a 351 windsor slide in easily to a 5.0 fox body mustang? If so what years???

and if I do have to force the engine in, what work will need to be done?

P.S. Sorry administrators that I posted this on the drag racing forum too, I'm trying to figure out how to delete it on these forums....

I get pushed out of shape
And it's hard to steer
When I get rubber in all 4 gears

-Beach Boys, Little Duece Coupe
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post #2 of 8 (permalink) Old 02-12-2007
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well since the 351 and 302 are based on the same block, it will be a piece of cake. i think the only diff. is that the 351 is an inch taller(??correct me if i'm wrong). but everything you will need is available just about anywhere. meaning headers, oil pan/pick-up, motor mounts, stuff like that (headers are 351 specific, i know that for sure). some companies even offer everything in a kit form check out holcomb motorsport's, mustang's unlimited, summit, jeg's, look around you'll find everything you need.
i think the only clearance prob you may have is hood clearance but that's nothing a cowl hood wont handle. other than that installing the motor will be the same as if you are doing a 302.

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post #3 of 8 (permalink) Old 02-12-2007
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I am in the middle of swapping in a 393, which is a stroked 351, into my '85 Mustang GT. As far as fit goes, the only problem area is that the motor is taller and wider, but a cowl hood will take care of that. The use of dropped motor mounts and careful selection of intakes allows some people to fit them under a stock hood, but it's pretty tight.

Parts that are different between the 302 and 351 include:

flywheel and balancer, due to different balance, 28 oz instead of 50

oil pan

intake manifold, because engine is wider

distributor, needs longer shaft

headers, will need swap headers to clear k-member and match up with exhaust pipe location.

I think that's all that has to be changed. Although they will fit, you most likely won't want to use the heads and cam from a 302 on a 351, as you won't get the full benefit of the larger engine.

OFR - old fart racing

We're not the fastest car at the track but we might be having the most fun.

If you're not having fun, then you're taking this stuff too seriously!
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post #4 of 8 (permalink) Old 09-01-2008
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Just a question to add to this post?

will a 5.0 5speed trans bolt directly up to a 351w,if not what will I have to get to do this?
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post #5 of 8 (permalink) Old 09-01-2008
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I used the transmission and bell housing from my 5.0 when I swapped in the 393 so I don't see any problem there.

OFR - old fart racing

We're not the fastest car at the track but we might be having the most fun.

If you're not having fun, then you're taking this stuff too seriously!
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post #6 of 8 (permalink) Old 01-09-2010
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like the previous post says

Make sure the flywheel imbalance is correct!!!
As mentioned above the 351 has a 28 oz imbalance and the foxbody 302's have a 50 oz I think it changed it 79.
I know for sure you'll blow your tranny if it's an auto tranny
(from experience I blew a AOD you shoulda seen the torque converter after)
So I learned my lesson the hard way.
I wouldn't suggest risking it, If you have a AOD you can find the proper flywheel from a 80's full size truck that has a 351 AOD combo, You'll wanna grab the starter from it as the 2 flexplates have differant tooth counts. Might be hard to find but it might save you some dollars. If your short on cash you can also find a dual hump oil pan in old grand marquis ( for sure) or crown vics (I think they came with 351's) But dont cheap out by a new pick up.
Ive used stock motor mounts in one of my cars and still managed to get one of those little triangle edelbrock air cleaners under my hood no problem, any more than that and you'll need a cowl.
I used convertable mounts on my latest build and I have room for a huge chrome ford racing assembely, So definatley go for the convertable mounts.
I bought a spec adjustable balance flywheel for my 4 speed so im sure they have one for the t-5 but havn't done that build.
The bellhousing will bolt right up to all sbf's and even 351 C's it's the imbalance you need to worry about.
Besides that you WILL need to purchase 351 swap headers, I have a set of bbk's and MAC's they both have a nice finish and were a decent price. Ive went with shorty's both times so can only speak to there fitment, which lines up with stock 5.0 X or H pipes or stock exhaust.
I would look into a stand alone dizzy to get rid of that SH**y expensive stock spark box.
Ive used a cheap pro comp dizzy one one of my applications and it works just fine, doesn't have the best reviews but I havn't had any problems with it and it's real cheap.
Overall it's really not that bad of a swap, I am no licensed mechanic and have done this swap several times. Just have the parts you now know you need and it'll go smooth.
Here is a excellent link for the swap
351 Engine Swap - 5.0 Mustang & Super Fords Magazine
Good luck and ANYONE willing to add more or correct me please do.
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post #7 of 8 (permalink) Old 01-09-2010
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1\2 hour of wasted time, lol

I should really check the dates before posting
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post #8 of 8 (permalink) Old 01-09-2010
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Originally Posted by 5.8capri View Post
I should really check the dates before posting
You didn't waste your time, I'm doing a similar swap, it was a good review for me..thanks
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