Big Block Engine Questions
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Joined: Apr 2004
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A 390 isn't going to get much better mileage than a 460, possibly worse.
A 351C may require gearing changes, and would only offer a modest change in MPG.
And neither will "bolt in" as the both have different bell patterns, and I'm pretty sure the engine mounts are different, along with exhaust, cooling, accessory drives etc.
Find an F250 with a 351W in it and a manual trans. That will give you a good combo of power and economy vs. the 460. But don't expect miracles--it's a heavy truck with truck gearing, truck tires and truck aerodynamics.
A 351C may require gearing changes, and would only offer a modest change in MPG.
And neither will "bolt in" as the both have different bell patterns, and I'm pretty sure the engine mounts are different, along with exhaust, cooling, accessory drives etc.
Find an F250 with a 351W in it and a manual trans. That will give you a good combo of power and economy vs. the 460. But don't expect miracles--it's a heavy truck with truck gearing, truck tires and truck aerodynamics.
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Senior User
Joined: Aug 2008
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Whats wrong there, im sure if you're only getting 10 with a 351 then yo gotta be lifted, heavy or geared. My 302 now gets 17 = ) im going to miss that.
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not lifted. f-250. 10mpg is what these trucks get, yeah i can get 11 if i drive easy and accelerate slow
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Senior User
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Then i guess the 460 isnt as bad, the guy told me he got 10 highway with it.
Post Fiend
Joined: Nov 2008
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From: McKenzie River
A 390 will likely get WORSE mpg than a 460.....
Consider this too.......a 351 working its guts out under a heavy load will get worse mpg than a 460 working far less hard with that same load......(not to disrespect the 351w, I think its a great motor too.)
Consider this too.......a 351 working its guts out under a heavy load will get worse mpg than a 460 working far less hard with that same load......(not to disrespect the 351w, I think its a great motor too.)
Post Fiend
Joined: Oct 2003
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From: utica il
the 370 is a junk industrial motor. i blew my 460 about 7 years ago and i was thinking about using a 370 i found for cheap and my mechanic<heavy duty truck and tractor shop owner> told my not to buy a 370 unless i needed an anchor for a yacht