Well, I understand how to shim the pinion and bevel gear, that's not the difficult part either, I just wasn't sure what the thin strips of metal did inside your diff.

As for the diff cup, I'll just go with the HB ones, non need to blow it on the more expensive ones.........yet.

Wow, long time since I saw this stuff, just placed a special order with Hot Rod Hobbies for 2 of the HB C8019's and they should have them by noon on Friday. Gonna be kinda close though, because we're going out of town that day, so I might have to delay leaving until after lunch......I'll be mad if the part doesn't come in by then though and we can't leave early.