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1977 F100 2WD 460 Swap

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Old 11-08-2018, 10:49 AM
Davon3598
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1977 F100 2WD 460 Swap

My 77 F100 has a 351m/400 that I would like to swap out for a 460 with C6 transmission but How hard is this swap? Would I be better off going with a 400 engine? Keep in mind the transmission in my truck right now is shot and the engine has had enough.
 
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Old 11-09-2018, 07:28 PM
85e150six4mtod
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460 is a bunch of little things. You will need a larger radiator, exhaust, and a few other things you will find along the way.

400 is easier. 9.5 pistons, a cam that opens the valves, dual exhaust, 4bbl carb if you want, you can double your HP, bring the torque up quite a bit, burn no more gas, not have pay for other stuff and you're going to be fiddling with a transmission anyway so have that one rebuilt. You'll be driving in far less time for far less money. Your '77, brakes, suspension, etc, will be happier with that 400 also.

Serving suggestion.
 
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Old 11-09-2018, 08:44 PM
Davon3598
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Originally Posted by 85e150six4mtod View Post
460 is a bunch of little things. You will need a larger radiator, exhaust, and a few other things you will find along the way.

400 is easier. 9.5 pistons, a cam that opens the valves, dual exhaust, 4bbl carb if you want, you can double your HP, bring the torque up quite a bit, burn no more gas, not have pay for other stuff and you're going to be fiddling with a transmission anyway so have that one rebuilt. You'll be driving in far less time for far less money. Your '77, brakes, suspension, etc, will be happier with that 400 also.

Serving suggestion.
sounds good sir! Thatís some great advice because honestly I just want the truck to run and drive on the road. How hard would it to swap a Running junkyard 400 in my truck?? And rebuild my tired engine slowly. The problem Iím having is someone swapped the engine and trans from a passenger car into the truck a long time ago. So I have a 351m/400 with a FMX trans in the truck instead of a C6. Iím sure the driveshaft and other things wonít match up.
 


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