Hello
All of the Chevy 10 bolt rear axles had C-Clips so there has been some work done to yours. The 68 Camaro would of had an 8.2 10 bolt with 28 spline axles. So yours being an 8.5 with 30 spline it has to be an updated custom axle. The unit you asked will work with or without C-Clip axles.