351 Swap Master Thread
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6th Gear
Joined: Sep 2024
Posts: 6
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351 Swap Master Thread
Maybe I haven't figured out how to search right, but I'm looking for threads of people actually swapping a 351 into a 302 truck. When I search I see lots of people asking about it, but I've only found one thread of it actually being done. Is there a better way to search for that?
Thanks
(I have a 1988 302 w/ M5OD)
Thanks
(I have a 1988 302 w/ M5OD)
Laughing Gas
Joined: Dec 2005
Posts: 904
Likes: 115
From: Laurel, MS
This is not exactly what you asked for, but here is my write-up from where I swapped my '91 F150 daily driver from a 300 with M5OD to 351W.
I also swapped to a PimpX ECU at the same time.
https://www.ford-trucks.com/forums/1...x-install.html
I also swapped to a PimpX ECU at the same time.
https://www.ford-trucks.com/forums/1...x-install.html
Cargo Master
Joined: Oct 2011
Posts: 2,241
Likes: 299
From: Kenner,La.
302-351
I have a 94 f 150 that had a mass air 302 /4r70. I found a good rebuildable 351. I used the mass air on the 351 with no problem. The one thing I had a problem was getting the correct 28 oz flywheel. The 351 was in a 94 f 250/e4od. The flywheels do not interchange because the offset puts the converter too close to the converter. I finally took the 302 50 oz flywheel to a engine shop that balances crankshafts and they modified it.
Also the truck had no catalytic converters and the 302 exhaust crossover was too small and I finally found one from Summit that worked. Probably easier is to just run full dual exhaust.
Hope this helps
Also the truck had no catalytic converters and the 302 exhaust crossover was too small and I finally found one from Summit that worked. Probably easier is to just run full dual exhaust.
Hope this helps
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Bearhead
1973 - 1979 F-100 & Larger F-Series Trucks
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Aug 20, 2015 06:58 PM
