power disk brake question

[oldcane]

This probably gets asked a lot but is doing a brake conversion as easy as going to the parts store and getting all the pieces?

I'm thinking about doing a 4/6 drop with disk brake spindles so can I just go to o'reillys and get rotors, calipers, pads, booster, m/c, proportioning valve and some brake line? I'm sure there a few accessory parts I'm forgetting but from what I see that that's a lot cheaper than a kit and I just don't have any good junk yards around here. Plus I'd want all of these parts new anyway.

I guess I'd have the same question about power steering, too.