Won't move

[1SS]

I just got done re-doing the entire suspension and steering on my 72' K10. Now the truck will not move when I let out on the clutch. The drive shafts still appear to be where they are supposed to be. I don't know if it is the parking brake or not becuase the engine doesn't even think about lugging. If it was the brakes I figure the engine would lug when you let out on the clutch. The truck ran and drove fine before I did the steering and suspension. Any thoughts??? Oh yeah, and the parking brake is pretty jacked up so if any of you know where I can get parking brake cables and such for my 4x4 that would be some great info to have too. all I can find on year one and LMC is C10 stuff.