The last one I did was a `47, I set up my case race lapping tool and lightly applied 500 grit lap compound to the lap/ I had replaced the race with a new one from KIWI. The race was the correct size and miked round to begin with, with the cases torqued and some 7/16 thick mill plate ( with holes in them to go over cyl spigot), bolted to the cases to simulate cylinders...I had the lap adjusted to a light drag, turning it with my fingers. After a couple of minutes turning it and moving it across the race, I removed it and cleaned the race and it had a very even patina...I called it good....then the same for the sprocket side...jb
I think I will convert my `47 cases to run the 48 up pinion races, and eliminate the blind hole..
[This message has been edited by Boogiemanz1 (edited 06 October 2002).]