Hi again,As you probably know they never put 460's in the 73 to 79 f250 4x4's.you need new motor mounts from L&L,new alternator brackets and a power steering bracket from Jeffs or L&L.Not sure if the ones off the 85 will work.And then the new exhaust either the new custom headers or truck manifolds.Some people have used the wrong manifold and cut the frame which is not a good idea.the 460 engine is bigger than the 351/400m(I call them boat anchors)so the fan on mine is real close to the radiator.CT