The '62 TF would solve the park brake issue, but it still uses the ball and trunnion drive shaft setup. The '62 TF would be the easiest fix. The '65 has the modern slip-yoke, and a transmission park setting in the tailshaft. The '61 Chrysler has no controls for the park setting, so something would need to be improvised. A park brake lever from a '63-'64 Chrysler works nicely. Using the '65 setup modernizes the drivetrain and makes maintenence easier, but it's a little more work on the front end...