I gave up on it,I had a 517 (460) in my 63 conv.The right header hit the body mount,and there wasn't enough room for a clutch fan.I would have had to go to a scoop or a tear drop hood,and I didn't want to do that.I had a 427 so, I put that into my 63.I used Crites motor mounts,the 1st.mounts he sent me positioned the engine to far forward.The 2nd mounts he sent were much better,but still didn't move the engine far enough to the rear.Also I had to grind the fins down on the top of the trans.