I just bought a 68 Camaro with a 327 and a powerglide. I'd like to change the transmission to a 350 turbo or a friend even suggested a 700R. If I go with the 350 turbo which kind of tailshaft would i need? And if i went with a 700R will there be a lot of modifications that I will have to make? Not sure what to do. I plan on changing the motor also to a 350.