Over the years we’ve all had to do screw-in stud conversions on small block Chevs. I made up a pilot by milling flats to fit the pushrod slot width and turned two different diameters to fit the two slot lengths they have. I used a 7/16 rod and milled the flat .322”, then turned the small diameter to .410” for the short slot heads. Just center in the slot and change to a 1/2″ end mill for a professional look.
Randy Torvinen
Torvinen’s Machine Shop
Menahga, MN
