This was in the 60's...NAPA Gold wasn't even on the horizon. We mostly saw oil company private label filters plus the few auto parts stores we had were trade-only outfits. Back then if you were not in the auto repair biz they would not sell to you!
Yes we had Midwest Auto, a local outfit called Wizzy's and one or two others but generally speaking you bought your speed parts via mail order or a local speed shop and your repair parts came from one of a few retail parts sellers...it was a different time!
Our local hardware store would not sell you a faucet gasket for your home unless you had a plumbers license...