65 with a 904. I imagine it cannot be too different as I can bolt up a different years 904 as long as I change from cable shift. If anyone here knows feel free to shout it out.
I would not assume on that. The 904 case is all pretty much the same size. 727 would be tight on my 74 and they came with them from the factory. You may have to do more floorpan banging to fit a later trans in.