Top Starter hole

Hey FABO!
Thrashing on the barracuda and while engine is out of car I'm trying not to create a problem down the road. The top hole on the mini starter is larger. I made an insert to take up the slop and am thinking niw that it's larger for adjustment.....yes? Or special bolt?

Thanks![
Used a stud (photo of kit from Mancini) in the top hole on my SBM

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