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All American cars I have seen loosen CCW and Tighten CW. What you need is a big half inch thick Heavy Duty breaker bar and a hunk of Persuader pipe to extend the leverage they will come off or break off . If you heat it you will ruin the wheel paint etc etc . WD-40 is useless there and if they are that tight PB Blaster will be of no help. Hope this helps .When you bolt it back up put some white lithium grease on the threads of the lug nuts with an acid brush. Alex

I have several old Pontiacs that have left handed threads on drivers side, stupid idea back then. They thought it would prevent loosening.

 

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Breaker bar with pipe, they will loosen or snap-one or the other

 

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My Milwaukee 1/2" drive electric gets things off air won't.

Home depot $199