I have an 81 1 ton 4x4 that has that damn gutless 351M. I want to swap in a 460. Has anyone done this conversion. Will all the brackets and accesories off the M bolt to the 460? Should I go with ext. balance or internal? What parts will I need to get the motor in? Different flywheel? Torque converter? Motor mounts?
As far as brackets are concerned, probabaly not. I did a swap (351-M out, 460 in) in a 79' T-Bird and NONE of my brackets would work. I don't know about the motor mounts. I'm sure you'll need a different flywheel and torque converter because although the 351-m/400 have the same bolt pattern as the 460, the flange on the crank is different, therefore requiring different flywheel and torque converter. Hope this helps.
"Stuck with a m*par, Settle for a ch*vy, Happy with a Ford!!!!"