switching 6 lug drum to 4 3/4 5 lug disc questiond

[sduckworth13]

I'm working on a 1969 Swb and I'm wanting to switch the 6 lug drum brakes on the front to 4 3/4 5 lug disc. I would prefer to go to the junkyard and pull parts from donor vehicles and rebuild the front end myself. I'm doing a 4 1/2 inch drop using 2.5 in drop spindles and a 2 inch drop coil in the front and 6 inch drop in the back. Has anyone done this swap before. I'm also wanting to keep my drum brake A arms because they have already been painted by the previous owner of the short bed frame I bought. Any help is greatly appreciated.

Thanks,
Scott