Hey all! Long-time reader, first time poster, and very grateful for all the help I've gotten from posts here in the past. I'm (as always) working on my 1967 RS. Due to some unfortunate mouse damage, the present project is the interior. I have the original 1967 steering column, and would like to keep it. I've been trying to find an aftermarket wheel to fit it and Moto-Lita caught my eye. They have one "GM adaptor" which I suspect is for a 1969 or later column. Unfortunately I haven't been able to figure out what precisely was the difference with the older and newer steering columns. For reference, I've attached a drawing of the adaptor from Moto-Lita and the dimensions of the steering shaft on my original column are: shaft 3/4", spline outside diameter 11/16", 36-spline. Thanks for your help!