The BAD AST Project - Faze II

[astroracer]

One thing I have decided to do is to replace the hydro-boost and master cylinder I got off a '95 Astro I stripped. I pulled them apart to clean them up for painting and there is quite a bit of rust on the inside of the hydro-boost unit. I don't know if a little bit of rust is anything to worry about but I do not want to be replacing stuff that doesn't work after I get this thing put together...
Another question, and I'll ask this in the brake section as well, is there a better M/C to use for disc/disc? The '95 had disc/drum.
Mark