Fork Rod Grinding On Starter

Your z bar has already been modified. The adj rod is on the wrong side, so that lever was turned around to try and make it work.
I would can those headers. Something is odd with them.
When I got my car, it was all mismatched swap meet parts, it took awhile to get my head around that. From the angle of your adj rod, I believe that you do have the 12 1/2" fork. Just guessing here, tti headers and a stock z bar may be your answer. I know, about $1,000. or so in parts, but what you have isn't working well. Find someone else's car with tti's to look at in person?