GM A body clutch linkage question

Hi all, I need to find out the size and type of bolt that holds the bracket to the frame for the Z bar. Is it supposed to be a self tapping type bolt? I have done late model Mustang stick swaps, but this is my first A body swap so I am a little wet behind the ears. I want to try to have everything together before I start. Any other tips on this swap would be appreciated too. I know I can't use the reverse lock out because I am using an early M20. Can you just change the side cover and forks to switch an M20 from studs to bolts for the shift levers? Thanks