The General also used lefthand lug nuts and wheel lugs on the driver side of virtually all pre-'65 Buick, Pontiac, and Oldsmobile models, as is proven here. So bet your friends and make some cash now.

A jam nut is a thinner-than-average nut tightened against a standard-height nut to lock the two nuts in place. Installed correctly, a jammed nuts resist loosening due to vibration better than a ...