The parking rods are different from 1/2 to 3/4. (chevy) My 54-3/4 was longer than the 1/2 I bought from Carter's. I ended up going to a local welding shop and buying a 5/16 dia. rod, and threading the ends to accept the clevis. YOu will need to tack a washer or clip mid way to attach the spring.
Hope this helps.
Jim
