Early GM trucks all came with 6 lug axles. Not only does this limit your wheel choices, but it restricts your options on brakes as well. BROTHERS Trucks is here with the solution with our 5 lug axle conversion kits. These kits include axles, drums, spider gears, differential seal, and studs. The axles are made from a high-strength alloy for supreme strength and durability. This kit is designed for 1970 rear ends with the axles featuring 11" drums, 1/2" studs, a 5x5" lug pattern, and are 31-1/2" in length.