Hi there, i've got an original 57 GMC 3/4 ton with the Pontiac 347 ci engine and 4 speed transmission, now i wish to put and automatic transmission, i was trying to put a GM hidramatic 350 but there's not any adapter plate in the market does anyone got any idea to switch to an automatic trans, if better if i try to found the original auto trans??? and where can i found it??? Thank u guys in advance... Mariano
