Which transmission (350, 400, 700R4) would be the easiest to swap with the Hydramatic that I have behind a 265 v8? I am concerned about linkage, driveline, clearance for the bell-housing, cooler, adapting the the 265 or anything else I am missing. I spoke to one transmission expert who said there was no chance the hydramatic would still work after 30 years of being parked. Comments on that welcome as well.