I once went to O'Reilly's to get a coil for my 52 pick-up (it was Sunday so my real auto parts store was closed). I walked up and asked for a 12v internal resistor coil (I had converted it over to 12v), and the gal at the counter asked what year make and model car it was going on. I said it didn't matter, my car probably wasn't in her computer anyway. She said they had to have it to make sure they got the right part. I again told her it didn't matter it was the same part across many different platforms. She insisted so I told her I had a 1952 International L110. She asked "who builds that?" I said International Harvester. She said "No, who builds that? Is it Ford, Chevrolet?" I said "No International Harvester." She looked at me like I was an idiot and called someone else over, he told IH was a company and she looked it up in the computer. Then told me she was sorry they didn't have any parts for something that old in the computer. I said ok, and that I needed another part. She said ok, what is it for. I told her I needed a coil for a 1969 Ford Mustang with a 351 Cleveland. She typed it into her computer, then went and got me a 12v coil off the shelf. I paid, said thank you, and haven't gone back since.