I'm new to the forum but have been getting a lot of assistance reading through threads the past few weeks. Reading through all the tech threads with "Dynaflow" in the title doesn't get me the info for which I'm hunting.
I recently picked up a 1956 Special hardtop coupe project with a virgin 322 and Dynaflow. The engine has some miles on it and looks like it was parked after blowing a head gasket. The cylinders mic to where they'll need a .030" overbore, to give you an idea of the miles on the engine and transmission. I'm planning ahead for when I rebuild the transmission. In my experience rebuilding TH350s, TH400s, and Torqueflites, it often requires two or three cores to make one solid rebuild. I won't be ready to start the transmission rebuild for some time, so I'd like to start collecting any core transmissions I find locally but don't want to collect ones that won't net me any parts for the '56.
Does anyone know what year Dynaflows would have the most internal parts interchange with a 1956? To clarify, I'm not asking what year transmissions can be swamped into a 1956 car in place of a 1956 transmission but strictly about internal parts. The repair manual reprint I have covers 1955 - 1958 Dynaflows suggesting the three years are very similar. Should I stick to collecting 1955 - 1958 transmissions, or will many parts from pre-1955 and post-1958 still interchange with a 1956? I'm talking about parts front anything like pumps, clutch drums, planets, internal shifter linkage/shafts, to valve body springs, etc. Thanks for the help.
