My truck originally came with an SM420 behind a 292. I have switched to a 350 and kept my transmission. The bell housing matched perfectly to the 350 and being that my truck was originally with the 420, I did not need a different driveshaft or crossmember. The engine is in the further back position now but everything fits perfectly. The 420 is very similar to the 465 so I hope this helps. And I agree...the four speed gives it some character.
