460 to a 351
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Junior User
Joined: Feb 2007
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460 to a 351
I have a 460 with a 5 speed in my 87 350. Will a 351 bolt up to the tranny? Also do you think a rebuilt 351 would have the same or more power then a tired 460 with 200,000 miles on it.
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Joined: Apr 2004
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I think a 351m will, but they are such a pooch stock you'd be ahead rebuilding the 460. As for mpg, you will get no satisfactory number with either engine. A good running 460 will do almost as well as a strained 351. It's a 1 ton truck...born to suck gas.
If it's a 351w it will not bolt up.
If it's a 351w it will not bolt up.
Senior User
Joined: Aug 2007
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From: bellevue, washington
a really really tired 460 is about equal to a good running 351 so with a good 460 you have a really powerfull truck, mileage isnt much of a improvment prob 3-4mog better maybe, a 460 is a really stongly built engine and will last you many miles
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Joined: Apr 2005
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You'll have to chage too much and spend more money doing that swap than just rebuilding what you have.
FWIW, do a compression test. It may still be in good shape and just need a tune up - like sensors, fuel pumps, catalytic converters if they're stopping up, etc.
FWIW, do a compression test. It may still be in good shape and just need a tune up - like sensors, fuel pumps, catalytic converters if they're stopping up, etc.
