I bought a new flexplate at Advance Auto Parts part # fra-100 it's has 168 teeth. I was running a 4 speed and swapped to a th350 and my old starter kept getting hung up, starter sat too close. It had the staggered bolt pattern. I bought a new starter from Advance, looked up a starter for an 80 c10 and that same vehicle list the same flexplate I bought. And I'm having the same issue with this starter, I have an 1/8'' drill bit to measure it. I put 6 shims on it and it still sits too close.