Odd timing problem 360

Ed Hamburger and possibly someone else use to make a little aluminum bushing that slid over the bottom of the distributor shaft. A distributor may have a little bit of up/down play and the cam/oil pump drive can also move up & down a bit if the distributor shaft isn't actually bottomed out on the cam gear. By snugging the bushing with a set screw low on the dist. shaft, one can press it down into the cam/pump drive. Then remove it and tighten the set screw where it was pushed up to. That can help reduce any up/down movement that may be there.