72 c20, 74 1/2 ton front end swap question

[crazy longhorn]

The ball joints,tierod ends are the same from 71-87 on the 3/4 ton trucks, & the a arms should also swap. The 1/2 ton trucks were a 71-72 deal on the parts, & 73- 87 on the next set of yrs. The 1/2 ton lower a arm ,will NOT accept the 3/4 ton ball joint, due to the size of the hole in the arm for the ball joint. If you use the 74, 1/2 ton pcs, I would swap the complete crossmember (as already mentioned), & run it as a 1/2 ton. On the older (67 -72) trucks, the steel bushed UPPER a arms will fit either a 1/2, or 3/4 ton ball joint.....just remember that you need the 3/4 ton LOWER arm ,to stay with the 3/4 ton spindles. best of luck..... L