what the hell is a sure grip

Most younger parts guys have no idea about the older cars. Sure grip? What? What is a carburetor? Oh, the antique fuel injector! I ordered a speedo cable a couple years ago from my Dodge dealer. He looked up a 73 Dart Sport, found the part, they had it available and I bought it. A few months later I called for a transmission dipstick. The younger guy told me they can't look up cars that old. He told me the vin was missing numbers. I told him the other guy had no problem finding it and he got mad and blew me off. Not all cars are new, brother. Better learn to find ALL the parts for ALL the cars.