Just wanted to say hello. I just picked up a 1972 C20 Cheyenne Super Custom Camper with its original 400 (402). I did not know that 4x4's came with the 402, I have been told that it was converted from a 2x4. It has the original cloth houndstooth seats that are a little worn, a manual throttle turn switch and a wood bed!! It is in great condition. So hello from Big Sky Country.