How do I get my rear wheels off?

LEFT HAND THREAD on the LEFT side of the car, and now for yet another old story

When I got out of the Navy in 74, I ran around awhile with a guy who was into the local cheapo dirt track. He had country property, and junked out a few cars. Calls me up one day. "You gotta impact wrench?"

"Sure, what's the trouble?"

"Gotta front drum and hub got it off the car, but can't get the wheel off."

"So bring it out here?"

"OK"

So here he comes, opens his trunk and throws this wheel tire / front hub on the ground. I looked at it and said "Chrysler?"

"How'd ya know?"

"I can tell by the wheel. Which side of the car's it off of?"

!!!MAN!!! he got the dumbest look on his face!!!!