Which lift kit 3/4 or 1/2 ton?

[kylecoyote]

Thanks for any help to start off........Ok I am putting 76 3/4 ton axles under my 77 shortbed K10 so going from dana 44 front 12 bolt rear to dana 44 front 14 bolt rear. I have researched and it looks like I have to change my rear u bolts and plates when I swap the axles. I'll be going with a kit that includes rear springs with u bolts not blocks. So I was wondering do I order the kit for a half ton or three quarter ton truck, ride doesn't really matter to me? Also to anybody that has done this swap if you went with discs all the way around and converted the 14 bolt what do you have for a brake setup? As far as master cylinder and proportioning valve?