Basically this is what I am doing. Keeping stock height and 8 lugs on my '67 Chevy C20. Got complete disk brakes, spindles, & A-arms from a '71 GMC 3/4 ton truck (2500). Though I got a new master cylinder with proportioning valve from CPP, new larger ball joints & tie rod ends....
http://www.earlyclassic.com/Tech.asp...20That%20Truck