Decided to retire the 350 next year in favor of a Caddy 500. I need to know what's involved in the swap, I've done some research but any how to's would be appreciated. What I know so far is you need custom motor mounts, more cooling and an adapter for the tranny. What else is needed? According to the link below it seems as if the 500 from a 1970 would be ideal as it is rated at 400hp and 550 ft-lbs of torque in the stock form. I was a little surprised to see that starting in 1973 they lowered the hp and torque considerably. Caddy Site Any thoughts on these? Like I said I'm looking to do the research now so I can know what I'm getting myself into.