351 w
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Freshman User
Joined: Jan 2010
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351 w
I have a mild built 70s 351w layin around that i wanna put in my truck but i want to keep the fuel injection.so will the intake off my 88s 302 and the distributer and coil and exhaust manifolds fit onto the 351.and what else would i have to pull off the 302 for it to work if the parts r swapable
Elder User
Joined: Feb 2007
Posts: 690
Likes: 1
From: Madison Ohio
Well from what all I understand you will need a ECU for the 351W due to the 88 was a SD set up. .. And you have to make sure your cam is EFI friendly
I am unsure if the 351W and the 302 upper intake plenum are the same.
That's just what little I know about the swap.
I am unsure if the 351W and the 302 upper intake plenum are the same.
That's just what little I know about the swap.
Senior User
Joined: Jan 2011
Posts: 120
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From: Medicine Hat, AB, Canada
You will need the 351w ecu, there is a different firing order unless you went with a maf set up,
The upper and lower intakes are both different from 302 and 351.
The distributor will not work either.
Pretty well everything for efi on the 351 and 302 are different like fuel rail, injectors, intakes. If you want to do the swap I would find a donor motor that is a 351 and grab its ecu and wiring harness, just the wiring harness from the four clips on the inner fender. But for the 302 you have grab the timing cover, water pump, stuff like that.
Also if you have a Y pipe the exhaust is wider on the 351
The upper and lower intakes are both different from 302 and 351.
The distributor will not work either.
Pretty well everything for efi on the 351 and 302 are different like fuel rail, injectors, intakes. If you want to do the swap I would find a donor motor that is a 351 and grab its ecu and wiring harness, just the wiring harness from the four clips on the inner fender. But for the 302 you have grab the timing cover, water pump, stuff like that.
Also if you have a Y pipe the exhaust is wider on the 351
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
You will need the 351w ecu, there is a different firing order unless you went with a maf set up,
The upper and lower intakes are both different from 302 and 351.
The distributor will not work either.
Pretty well everything for efi on the 351 and 302 are different like fuel rail, injectors, intakes. Also if you have a Y pipe the exhaust is wider on the 351
The upper and lower intakes are both different from 302 and 351.
The distributor will not work either.
Pretty well everything for efi on the 351 and 302 are different like fuel rail, injectors, intakes. Also if you have a Y pipe the exhaust is wider on the 351
Yes go find a truck with a 5.8EFI in it and grab the whole motor but you do not want the wiring harness and do not touch the wiring in your truck it does not have to change at all, just plug in the 5.8 ECU and connect the other end of the stock harness to the new engine. Also note that you need a 28oz flywheel or flexplate to match the transmissin in your truck, you cannot use the one from the 5.0.
New User
Joined: Jun 2007
Posts: 23
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Hey I have a ecu from a 1989 with 351w for sale. You can email me at spow1998@frontier.com if your interested. I also have a complete engine too. Which means I have everything you need for your swap. thanks
