.002 is good. I shimmed mine by cutting a strip of metal duct tape (the adhesive foil so common today). It gave me the .003 I needed. To check the fit I got a bright light and shined it front, back everywhere I could to see. In my case, there was one area on the left side which didn't contact nicely no matter how the crank was positioned. They say the rear seal groove from 1956 forward was concentric with the crank...and it should be, but honestly I'm not certain it is. In my case it wasn't.
Here is what the crank in the 1959 rear surface looked like:
http://i1154.photobucket.com/albums/p535/JonGoodman/ropesealcrankend.jpg
Here is a look at the rubber seal which came out of it compared to a new one:
http://i1154.photobucket.com/albums/p535/JonGoodman/rearmainendtoend.jpg

Good luck!
Jon


~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end