Fork Rod Grinding On Starter

There is a lot more going on here than just the z bar. Is the z bar parallel or level to the ground? Do we know if he had the 12 1/2" fork or 10 7/8" fork? Stock bellhousing?
I have an old Lakewood scattershield, am using the 12 1/2" fork and stock z bar with tti headers. With a 10 7/8" fork and pivot, the tti z bar would work. I did have to modify the pivot bracket at the bellhousing for both. I tried both forks and pivots trying to make my diaphragm clutch happy. I ended up with the correct 12 1/2" fork, that is what Brewer called for. Seems like each car has it's own personality. The lever sometimes needs a little twist one way or another. Are the motor mounts and trans mount in good condition? In the end, a little bit here and there turns into a problem.