Disc brakes on 1970 Chevy C-10

[The Blue Pig]

Hey, I am new to this site, but I am happy to see so much information, I am sure I will put much of it to use. I have a 70 C-10 longbed that dI would like front disc brakes on. I know that the 71's were the first half ton-2wheel drives with disc, but I dont know if they went to 5 lug in 71 or 73. Also, I was wondering if anyone has done this conversion, it seems simple enough, transfer the master cylinder, combo valve, spindles and that stuff onto the front end of the 70, but is there anything I need to anticipate will cause problems? I dont have a problem with fabbing up a few new mounting points or anything like that if I need to, and I plan on getting new lines when I do it. Just wondering if anyone has done it on this year (or 67-69) of truck, and if there are any tips for installation, and also, any tips for hunting down a good donor truck. Thanks for any helpful info. Also, has anyone else ever looked into or bought from Chisholm suspension? I am looking at getting some control arms, shocks and leafs from them, I called with a couple tech questions and they seemed to know a little bit about what they are doing. The guy didnt know if their springs were linear or progressive rate type springs, and he wasnt sure about anti-dive angle geometry, or camber change when cornering. Just wondering if anyone is actually employing one of these systems on a truck. ok, I am done.