i just bought my 65 yesterday. it has a 302 in it right now but I have a 390fe in a 61(i think) 4-door fairlane. my question is how hard would this be to pull off? would i be better off buliling a 347 or some such smallblock? i just want gobs and gobs (and gobs) of tourque and i really dont want to cut the car up if I can keep from it. any advice will be helpfull.