Kevin and Demo', Buicks in the '50s to early '60s had left-hand threaded studs, at least some models, and at least through '62. My Dad had a '62 Invicta that had left-hand threaded studs. I had a '67 Buick Electra that did not (right-hand threaded studs, both sides). I've never seen Buick hubs on a Chevy truck, though.
