Guys, I have to make a decision in the next few months as we build this 1979 SuperCab truck (I call it truck, because I was told I was buying a 1979 F250 4X4, but the VIN does not make it an F250, but originally an F100.) The running gear looks very much like a 3/4 ton.

I would like to hear some opinions from you guys that have made the swap from a 400 to 460 and the pros and cons of each engine.

I have plenty of time to make a final decision, but am torn between a rebuild of the current 400 in the truck. Or use the 460 in the donor truck. We are doing an off- frame restoration on a 1979 4X4. Either way the engine is going to the mechanic for a rebuild and a bit more umff. Since we are going to use the front clip and cab from the donor truck (1977 F350 2WD SuperCab) it wouldn't be much more effort to put the 460 into the 79 chassis by moving the engine mounts, and the other brackets from the '79 along with the headers it currently has.

Am I oversimplifying this engine swap? The 79 has a C-6 tranny and assume the torque converter from the 77 460 should go with it.

My son is the mechanic and this is his first truck to restore. He has restored several Mustangs so far.

Thanks in advance.
Rich