These Holley steering shaft kits were designed to replace a worn stock one on your early 3rd generation GM C10 trucks or with an engine swap where additional clearance may be needed. With sturdy DD-style steel shafts and dual u-joints, there is plenty of adjustability for your project to ensure everything is exact and safe. *See Holley Part # 320-323 for 1979-1987 C10 Steering Shaft