I was ready to drill the mounting holes for my bullet rear lights using the template that Tim sent me. Well, my lights are apparently not the correct ones. They match the contour of the truck body perfectly, but the mounting holes are 5 inches apart and beside each other rather than above each other. The unit is about an inch longer than the correct one. The stainless bezel and lens are identical. Is this likely off an old car or wagon? Did the lights change during the '47 - '53 series? It does have a GM part number on it, 922144, it also says Guide made in USA. Also says OLDSIG on the top as well as the lens.