If you want them, I can post up a couple good photos from an old eBay auction, of a NOS over the counter 987028, which is listed in the August 1966 P&A Catalog for Camaro, and all other Chevrolet models. It has the single mounting hole, stepped bracket, and long wiring. I've no idea what the difference is, if any, between it and the 3903402 "Lamp Assembly" listed in the AIM.