I installed the first 460 engine into a 1970 F250 back in 1970---took out 360/c6 and installed complete 460/c6 a/c p/s etc from a Lincoln M3-
Over the next couple of years many Ford people saw it (was at C. Shelbys often) and they decided to do it in 73-----after they did it I got a set of the steel frame mounts from them and changed out my modified 360 mounts--this lowered the nose of the engine for me and helped with the drive shaft angle when loaded heavy.

I just met an old Ford guy from back then ( didn't know him) (but he knew who I was) and he told me my old truck is still running some where in Colorado---It got to be known as the "Devil Truck" and evidently still has a following of those guys.