The ball and trunnion has sets of needle bearings in there (the ball part) might allow for some play if they are worn. Double check the torque and play on those I would think. They have rebuild kits but you have to be very careful with the pin etc, to keep proper balance.
Yes they are tricky to rebuild! I am glad I did my 64 V200 and will need to do my 64 Base model V8 swap. BTW I found a 65 V8 904 and switched out the valve body to work with my push button shifter.