I agree that the 460 would be easier and cheaper to make power just because of its size. I know this might be a little far fetched, but my father once told me that there were a few C4 bellhousings that were made for the 351M/400. That bellhousing would bolt to the 460. Ask some of your fellow club memebers. Dont know if they are out there/if it is really true. You never know.Which ever way you decide, best of luck. Sounds like it will be a sweet ride.