Transmission extension housing

It's a 69 Cuda convertible. I just pulled out a slightly tired 360 & 904. I can also confirm that all the 727's downunder are all the same dimensions as well. I was thinking that because the motor/gearbox didn't line up on the mounts that the gearbox was maybe different. I managed to get a long bar in between the motor and firewall and wedged the motor forward enough for it to sit on the mounts.