I think I'm over the hump. The connection to the original shaft is a weld on fitting. I added a set screw and flat spotted the shaft. This let me adjust the length to get it just right before I welded it and maybe a little redundancy. Every thing fit really well, maybe a little too well. I'm concerned about being able to adjust the box so I'm going to slot the mounting holes on the quickener .100" or so and tighten it after adjusting the box.
