3/tree problems

Well I paid a lot to have this PB auto '64 Dart made to 3 /tree like I had way back. Got the parts car, had transmission checked/rebuilt, etc. Still compared to my old car (yes I realize it was over 40 years ) the column shift is loose, floppy and gets stuck. Sometime it will be in neutral postion and still in gear. I realize column shift linkages can have problems like this, but what is the most likely culprint causein the shift lever to get stuck and not move? Eventually after stopping, it comes loose again. I guess I should have had a 4 speed covnversion instead. Less room for problems?

Also, was the 4 speed even an option in '64. If so was it only w/ the V8. I think I read here that '64 was 1st year for V8 ?