Arrgghhh..

So I have been thrashing for the last month or so to finally get the 64 out of the garage after being dormant for the last 3 or so years. Deadline I set myself was this Friday. Re-gasketed the motor, converted to 4bl, new cam, 68? 4 spd, spec. Clutch, 8 3/4 rear, new front suspension, rear suspension, disc brakes, blah. Blah. Blah.
Fired it up first time in 3 yrs today. Runs fine. No gears. Can't engage any gears, shifters jammed up. Popped the linkages off, put the shifter in neutral, the shift linkages are too short. It has the factory 64 shifter, and the factory 64 shift linkage on a later transmission. What do I have to buy? Do I need to change the shifter or the linkage, or both? Hopefully someone can point me in the right direction.