Shifter mechanism different ---- Will it work ????

I tried this years ago with my 70, which had a pistol grip. I bought a competition plus, but if you look at the bolt in levers and the shifter, you'll discover flutes that "match" each other when the lever is installed in the shifter. This prevents movement of the lever which will happen if you simply drill the push in lever.

I finally welded my pistol grip lever into the aftermarket shifter to solve the problem.

Flutes: