I don't think they'll fit. Y'all better measure before you buy.
Iirc, the 6 lug wheel has a smaller center than the 8 lug. The older caps fit in the center with clips, the stock caps on yours fit over the center on some lugs stamped in the wheel.
I could get you a measurement on the 8 lug wheel this evening, if you need it. I've got some stock 6 lug wheels, too, but they're out back and it's been raining since yesterday morning.
