1964 904a transmission (push Button) torque converter.

I have one from a 65 Barracuda .I'm in Huntington Long Island and the factory ones are the same for the six and the 273 in 65 and 64 .Probably a little later too.What is it going behind ? Where you run into problems is with the crank flange on the later 68 and up motors.They are a different size .