Originally Posted by big jim
I picked up 2 and have yet to have time for them. I hope to get to them over Christmas. Hope I have better success than you did. Does anyone have access to more valve bodies should I decide to attempt to drill one out for greater flow?
Try restricting the exhaust to the bolt. It means that the exhaust will be forced to the hammer instead. That's why the ports are there. It was one way of tuning the blow back.