Will 302 based mods work on a 351W or larger?

[agent007kimball]

I have twisted wedge heads, track heat intake, etc....and i am wondering if a Windsor motor would be able to use these mods. For example, would I be able to fit these parts on a 393 windsor?

 

[bock]

I have twisted wedge heads, track heat intake, etc....and i am wondering if a Windsor motor would be able to use these mods. For example, would I be able to fit these parts on a 393 windsor?

Yes, your TW will fit on a 351W maybe you will need to drill your head-bolts hole at 1/2 inches ,cause the 351W use 1/2 in bolts and not 7/16 like the 302.

 

[agent007kimball]

What about everything else? (Track heat Intake, exhaust, water pump) Will it be an easy fit?

 

[bock]

well your intake go one the heads,so yes.... the exhaust fit in the heads to,so yes too... by the outside a 302 and a 351w are pretty much the same.

 

[agent007kimball]

So a windsor swap is no more difficult then say a 347 stroker swap? Everything will fit the same? It will all fit under the stock hood? I was under the impression that a lot is involved in a windsor swap compared to say a 331 stroker.

 

[Deadlysniper]

I've done 351 swaps at a shop I work at. Here's what you'll need:
A Trickflow 351 lower intake manifold. the 351 has a 9.5 deck and the 302 an 8.5 i think. The lower intake is much wider than the 302.
Second, you need a new distributor, a stock 351w dist with the TFI module on it.
Third, a new oil pan, the 351 is bigger.
fourth, you'll need to modify your 302 fuel rails. remove the stock rubber lines and get longer fuel line to clear the intake.
fifth, you will need to drill out the heads bolt holes to 1/2" like bock said.
Sixth, new headers. The MAC 1 3/4" long tube 351 swap headers are great. The reason your 302 headers won't fit is because with the added width and heigth of the 351, the 302 headers won't clear on the sides, near the frame. the MAC's go lower and the steering shaft goes through them on the drivers side.

On a side note, if your 351 isn't a roller block, just drill and tap the valley for the 302 spider, lifters. You can get a retrofit roller cam.

 

[bock]

go get more info .

but im pretty sure its not more problems goiing for a 351w.

and you can stroke it till 408!

 

[Deadlysniper]

Oh and you'll need a rased hood. When I do my 351 swap, I'll stay with my cervinis stormin norman and a cobra upper. it'll clear fine. Also, you use stock motor mounts

 

[Deadlysniper]

go get more info .

but im pretty sure its not more problems goiing for a 351w.

and you can stroke it till 408!

True! a 393 or a 408 stroked 351 will get you 11's with good heads, naturally aspirated!!!

 

[Deadlysniper]

one other thing I forgot, you have to do some minor mods to your coolant lines that run from the lower manifold to the heater core if you plan to keep your heater. I think it just entails cutting a small piece off and using a rubber hose or something. All the 351's we've done don't have heaters.

 

[TrophyHead]

Do you guys think his set-up off the 302 will be good enough for a 393/408 stroker? Im just thinking with that many more cubes he's gonna want more CFM. I'd stick with a 347. Correct me if Im wrong guys and gals.