351 for a 302
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Senior User
Joined: Jun 1999
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From: 3 mi N of Crookston, NE
351 for a 302
Somewhat similar to an earlier thread by fossman1. I am thinking about swapping a low-milage 351 from a 1994 into my 1995 with a 302. Is the wiring harness the same? Will I just need to change to a 351 computer? Any other changes between 1994 and 1995 I need to know about?
Also, can someone point me to a good explanation of the differences between mass air and speed density? I'm not much of a mechanic, just trying to find something easy I can do myself.
Also, can someone point me to a good explanation of the differences between mass air and speed density? I'm not much of a mechanic, just trying to find something easy I can do myself.
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
Is your '95 mass air? If so there's no need for a computer change. As stated elsewhere you need a complete EFI 351 motor oilpan to throttlebody, with that you can put it in where the 302 was and everything will just plug in.
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Senior User
Joined: Jun 1999
Posts: 121
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From: 3 mi N of Crookston, NE
I bought the 1995 used with around 130,000 miles on it. The previous owner may have put in a rebuilt motor, I don't know for sure. If so, there may have been other changes made, but I don't think so. How do I tell if it is mass air? Without taking apart anything, I can say that there is a sensor plugged into the air hose just next to the air filter box, so I am assuming it is mass air. The air filter hose splits into two with a Y just before the throttle body. Was 1995 the year of conversion to mass air in the F-150?
