worn upper a arm bolt, interchange help

Rats. NAPA did not have anything back to 1964. I bought one for a 1967 A body. The bolt is about 1/2 inch too long and the bolt shank is flattened across the entire length of the bolt. The factory bolt is not like this.

I had no luck at the local pick n pull for a used one.

cudamark, I will send you a PM.