Find a real alignment shop, and have them do a full inspection. Pay particular attention to lower ball joints. If you're wearing out the inside of the tread on both sides, you've got excessive negative camber. The 69 models were notorious for bolts getting loose and shims falling out, so be sure the upper control arm bolts are well-tightened, and check them periodically.
Ralph Nader was, and still is an idiot, but he had very little to do with the Corvair getting canned. The air-cooled flat six engine couldn't meet the 1968 air quality standards, and Chevy chose not to retro-fit it with a liquid-cooled engine. it was a poor copy of a Volkswagen anyway, and Nader just helped its demise along somewhat with all his "The sky is falling!" panic.
Jerry
