These are the measurements of the ever so elusive and mysterious starter bolts. Maybe someone might be interested one day, or maybe I just don't wanna pay gold weight prices for them again.
(https://i.imgur.com/BNJ55IP.jpg)
Ask me if I missed something. I have 4 starters and none are the right one for my GT, so if you want some starter motor measurements I'll help out there too. But the step bolt hole is 9mm reamed, the other 2 are 8.5mm diameter (lower pictured bolt).