Early 92 series engines used the old style valve covers. The AMT GMC General kit also has a 92 without turbo. AMT kits depict the early style valve covers. Later 71 series can be found with 92 style valve covers. Much like some of the variations of the small block Chevrolet, the inside is what is different. The 71 is 71 cubic inches per cylinder, the 92 is 92 cubic inches per cylinder. If you want it to be a 71 paint it Alpine green, (or any color for that matter) and it's a 71. If you want it to be a 92, it's a 92, but you can't paint it yellow and make it a Cat.