[steve s]

I agree with all of above, especially Farrell's specifics about where to start. However, to check the radius ball, you're going to need a picture. There are several good books out there, and you really should get a few--unfortunately, there is no one definitive "shop manual". I would start with Les Andrews' books, then the Model A Service Bulletins, then the various volumes published by MAFCA. There are several good parts suppliers, but you have to be alert for marginal repro parts; usually, the vendors will be candid about this IF YOU ASK. Snyders and Brattons are great and handy for east and midwest. I've only heard good things about Berts in CO, which may be handiest for you--they also deal in original used parts, which are usually your best way to go. Welcome to the hobby!

Steve