we just scrapped a complete 69 galaxy 500 with original 400 some engine and auto trans in it and was convertible and all, maybe you could have used some parts from it ? we also have a 67 fairlane coupe thats tubbed with 9" four link and we are gonna scrap body once we rmeove the drivetrain and axle setup

dunno if anything from that would work for a galaxy ?

hot rodding is definitely all about improving a vehicle in alot of ways including braking steering handling, etc. engine and tranny upgrade should be last or one of the very last improvements in a hot rod building up

yep

good luck