I machined the 616 heads to fit the 617a pc's and opened them .010 all except the tiny one on the bottom. which is about .145 for the largest one. seems even bigger would be fine but have not tryed it.
I machined the 616 heads to fit the 617a pc's and opened them .010 all except the tiny one on the bottom. which is about .145 for the largest one. seems even bigger would be fine but have not tryed it.