swapping a 302 for a 351w - Ford Forums

10-20-2002, 14:55

I have a 1980 mustang, i blew up the 302 i had in it and I found a really nice 351 for it. i was wondering how well this will fit, i know its 3 inches taller and 2 inches wider, so i was wondering if i would have to change anything? also i was wondering if anyone knows what car has the dual sump 351 oil pan? and last if i would have to lower my front stabilizer bar for that oil pan.

thanks,
Marc

Cougarman · 11-14-2002, 15:11

What year is the 351? You should be able to just swap the oil-pan and the oil sump. What kind of exhaust do you have?

focusw8 · 01-24-2003, 14:21

Since I currently have an 86 Mustang coupe with a 351W in it, i'll answer your question. The best thing to do is to buy the Ford Racing 351W Oil Pan Swap Kit. The motor fits just fine. But you have to pay close attentoin to what intake you are going to use. I have a Wiend Stealth 4bbl on mine. A drop style air filter is almost a must. Unless you want to get a cowl induction hood. My 351W is a 1969 model. And I used a 1987 T-5 trnsmission. The motor and trans are of different balance. So the 302 harmonic balancer and flywheel were useless. I bought the Ford Racing 351W swap flywheel, and used the 351W harmonic balancer. I also purchased the BBK 351W swap 1.75" longtube headers. As you can see I am a firm believer in using specially made swap parts. Makes the job so much easier.

cougar190 · 02-14-2003, 09:29

a 302 oil pan will not fit a 351 W because the main journals on the 351 are larger. Sorry!

big1 · 03-08-2003, 07:58

The above info on the oil pan is wrong. I;m currently running a 302 pan on a 351W it fit's fine. If you don't want to purchase the specialty pan any V8 pan from a fox body will work.

cougar190 · 04-15-2003, 21:56

something isn't right here!! I measured two oil pans today one off a 302 at the flange (outside to outside) on the rear main it measured 5.25 inches. Then I measured a 351 Windsor same way (outside to outside) of the flange on the rear main and it's measurement was 5.75 inches this a difference of .50 (half an inch)...and according to at least chiltons the main bearing journal size of a 302 is 2.2482-2.2490 (approx 2.25") and a 351 windsor is 2.9994-3.0002 (approx 3.00") you do the math !! cougar

rbohm · 04-24-2003, 02:00

the 302 oil pan will NOT fit the 351w. i have both blocks and both pans. the front of the oil pan is not the problem as the timing cover interchange between the engines. the problem is the rear. the maincap on the 351w is larger than the 302. the only way to make a 302 pan fit the 351w is to cut out the 351w rear pan section and graft it on to the 302 pan.

01-24-2006, 12:08

i just installed a 351w in my 84 mustang and the oil pan off a 302 will not bolt on a 351w. if you buy the ford racing swap kit you can't run a hv oil pump.