At least with Pontiac you can phs a car for a high price, lol. Others you can’t find and paper trail on.
I recently saw a 77 T\A with Fisher T tops an a consignment place. I asked the owner if it was a PT car lol. He said why? I said, in 1978 fisher t tops finally came out, not 77. The owner failed to list it was a re- roof. Lmao
I worked with a goof that did a resto on a 65 Nova. He didn’t know it wasnt a factory rag top till 1/2 way through. He was ordering the seat covers, we just found the correct seats at the fairground swap, the guy at year one said they didn’t make a rag top in 65.

lucky for him they did make a rag top earlier. But he had to finish the cloning butchery or whatever you call it, the recreation, Lol
People don’t tell, that’s the prob. It’s not the $20 pc of no’s lit that fakes it, it’s the fake car.