Belltech lowering spindles

[dec010974]

Hello to all. I have a set of Belltech #31200, lowering spindles that were basically given to me. My c10 is a 1980 squarebody. I want to know can I jerry rig and use these spindles for my suspension? I have referenced the ball joint/tie rod part numbers and it seems that the upper ball joint seems to differ. Is it possible to use an upper control arm from a 1971 or 1972 c10? the Belltech spindle I have is spec'ed for a 1971-72 c10 truck. Safety is priceless to me. Thanks in advance, Clark.