Im looking to switch from a 203 to a 205 in my 79. It has a turbo 350 transmision. I have access to a 205 that was mated to a 4 speed. My 1st question is can the coupler be changed from an automatic model to make this 205 work? My 2nd question will the coupler from a 203 automatic work on the 205 that was meant for straight drive? I know I can take all this stuff apart and figure this out but I was hoping someone had already done this to save me alot of unescesary work.