Made this magnet gap gauge last week. Others have done the same ... just my 'spin." The original piston pin has a brass bushing which I threaded to take a stainless probe. Bill Crosby made the bronze insert in the rod bearing area.
Very nice! Great idea on the bushings in the rod and in the adjusting end. If I had a lathe at the time and if I had thought of it, I would/could have done the same thing.
Those clamping collars look familiar - John Regan pinion bearing kit collars?
Those collars are like the collars you can get at AC supply houses. They are used to lock bearings, pulleys and etc. on shafting in air handler units.
That's a great idea for sure!
Isn't that an "X" rod? Dave