anyone ever swaped a 460 into a 76

[tcs4]

I have a 76 f-250 4x4 that has a 460 in it. not the original motor, it also has a 4 speed tranny, this means it came with a 390 or 400, since the bell housing is stock and it fits the 460 it came with the 400, they didn't put a 4 speed behind a 460 untill 83. my problem is it vibrates, someone put the wrong flywheel on it. so ant ideas on what combos of flywheels, pressure plate, and starter will work

[calhouncarpainter]

I've been told a 360 flywheel will work on a 460. Yours may have a 400 flywheel?

[Glamisman]

It has been a while since I worked on a 460 ... I think they have a harmonic balancer on the front of the crank, where the belts go. I know that when the balancer gets old the rubber gives way and the balancer slips, causing a vibration.