360 Keep it or Replace
Senior User
Joined: May 2009
Posts: 347
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From: Skyway, WA
Ford never put in a 390 in a 4x4 F100, F250 or otherwise from the factory, only 360. The only way yours is a 390 is if a previous owner made the change. Is the 360 worn out? If not, I'd go ahead and do exhaust and intake/carb. Converting to 390 requires acquiring and installing 390 crank,rods and pistons. If you get in that deep, you should be doing a full rebuild. All the exhaust or intake upgrades will still be good when you make the leap to 390 (or 410). Not sure what your budget is, but a proper rebuild is a signicant expense.
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dilmachender
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usuallybowtie
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
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