I wouldn't even try re-broaching existing splines. You loose too much material and nothing fits right. Right now, I'm trying to find a machinist that can roll splines on a steering shaft rather than broaching because it removes too much material on the existing shaft. Still looking. I posted Gerry Hawkridge at Hawk Cars on your thread as a place to check for new adapters. Gerry can machine any bolt pattern you'd like and it would be new Rudge splines. That's my thoughts. Email me if you want at
lhaz@cox.net. This PM box is pretty small! Larry