Found a front end kit that included 2 1/2" drop spindles, cross drilled rotors, calipers, stainless brake lines, brake pads, and all other needed parts for converting to disc brakes in the front. Still will need the newer style ball joints for this to work. Mine was a craigslist find that the guy hadn't used and isn't available any more. But Several vendors make them including ECE, CPP, and GMCpauls
http://www.gmcpauls.com/67-72_d&s.htm GMCpauls seems to have the best deal...the picture is from ECE.
