HELP *Turbo Action Shifter Cable Adjustment*

I’ll try to keep this short. I recently installed my new engine and untouched 727, rmvb transmission, along with my untouched Cheetah 7001B shifter. All were working flawlessly last year when I removed them. I adjusted the shift cable as described in the manual, but am having an issue I will try to describe.
Once the shift cable is adjusted, I can start the engine while in P and or N, but if I rock the car for or aft while in N, it will not start while in P, but will still start in N. Now when I rock it for or aft while in P until it stops rolling, I hear the transmission “click” if you will, then it will start.
Is it merely an adjustment issue, or something else?