76 duster Transmission??

Hi i was looking at getting a transmission for my 76 duster. I am swapping the slant 6 for a 360 and need a transmission im looking at a plymouth fury transmission not sure of the year at this time but i think the car is lean burn if that helps with the year? I was wondering what transmissions will fit without alot of work? I guess the transmission is a 727 or 904? Im new and not realy sure.