I dont know if its that much more harer to put the lift on my 73 K20 than on my old 81 Blazer or just the fact its been 5 years. I dont have the Blazer any more just the rough country all spring 4" lift. It seems I cant get the rear axle back enough to line up to where it should mount to spring. Do I need to cut and re weld up myparking brake brackets or something. I would assume since it ha a longer driveshaft than the Blazer it should still work OK. The rear is supossed to be the easy end!!