Need Help on Front disc brake swap

[jover]

Hey Everyone: I know its been a long time since I've posted anything, figured I'd give all my favorite truck guys a break! Now, I have a 68 Chevy Stepside and I've been offered a 1977 GMC for any parts I might need. My question is I would like to turn my 68 over to disc brakes in the front and I know this 77 stuff will fit on mine or at least I think it will. I need to know exactly what I need to take off this 1977, and how much of a pain in butt will it be to make the swap. I need to do it pretty ASAP as my local junkyard won't hold this truck long before he sends it to its demise. Both the 77 and my 68 are 1/2tons. Any help you can give me in detail a girl can understand would be appreciated. Thanks in advance. JoAnne