I'm converting to power disk brakes (from manual drum) and bought the booster/master cylinder combo. do I need to take the master off the booster to do this? I've never done it before, so any adivce would be great. thanks

Dont have to remove the master if you dont want to. There is a kit (or you can make your own) with fittings and short lengths of hose so you can hook up to the master outputs and return the fluid back to each reservior. Fill the master and pump the pedal (let up on the pedal slowly if you dont want a mess) until no air bubbles come out of the hoses. Then remove the kit and hook your brake lines to the master. The small amount of air you will get in the system while hooking up the brake lines can be gotten out by tapping the lines where they attatch to the master with a wrench. The air bubbles will come up in each reservior...works great if you are just replacing the master and not going through the whole brake system. If you are installing disks you have to bleed the system front and rear anyway.

I just picked up a $9.00 bench bleeding kit from Napa, bled the MC right on the car. Just screw the little plastic fittings in where the brake lines go and route the tubes up into the brake fluid sitting in the open MC reservoir. You may have to hold your finger over the end of the tubes on the upstroke, however. I found that the tubes were sucking back when my friend let up on the brake, so I just plugged them with my finger when he let up the pedal.
Just for safety's sake, you may want to bleed the whole system afterward.