This new C-notch kit is great! This design allows for the correct rear axle-to-frame clearance on trucks that have been lowered in the rear. This well-designed kit can be bolted into place in just a few hours. It can also be welded in place for additional strength or on vehicles that will be towing trailers. Welding is not required for most vehicles as no weight is supported behind the rear axle. All suspension connections are made ahead of the axle on coil spring trucks. BROTHERS has installed this kit in our 1971 Suburban project vehicle and we love it. With the rear end lowered over 6 inches, it still rides perfectly. (Suburbans, 2wd blazers, and panel trucks may require slight modification to the C-notch kit, call for details). You will never have to worry about metal-to-metal contact or riding on the snubbers ever again! The kit made from 1/4" steel comes complete with urethane snubbers. This new C-notch kit is great! This design allows for the correct rear axle-to-frame clearance on trucks that have been lowered in the rear. This well-designed kit can be bolted into place in just a few hours. It can also be welded in place for additional strength or on vehicles that will be towing trailers. Welding is not required for most vehicles as no weight is supported behind the rear axle. All suspension connections are made ahead of the axle on coil spring trucks. BROTHERS has installed this kit in our 1971 Suburban project vehicle and we love it. With the rear end lowered over 6 inches, it still rides perfectly. (Suburbans, 2wd blazers, and panel trucks may require slight modification to the C-notch kit, call for details). You will never have to worry about metal-to-metal contact or riding on the snubbers ever again! The kit made from 1/4" steel comes complete with urethane snubbers. Compatible with 1963-1972 Chevrolet/GMC C10/C15, Blazer/Jimmy (2WD) & Suburban (1/2-ton 2WD) Compatible with 1963-1972 Chevrolet/GMC C10/C15, Blazer/Jimmy (2WD) & Suburban (1/2-ton 2WD)