I picked these up about a month ago. Still building my truck and recently got one of the bedsides mounted up. Had to see what the wheels looked like.
The wheels are AR Torq Thrust 2's 18x8 with custom backspace, can't recall, but I think the backspace is 3.5 in. as oppose to 4.5 in. for off the self 18x8. The previous owner had them on a 88 Monte Carlo SS. The tires are 245/40-18 Brigestone Potenza.
The tires are a little thinner profile that what I would like but the wheels and tires were close to new and I paid $750 for the set with lug nuts so, I can live with it.