boman,
After replying a couple of days ago to your post, I just thought about this earlier today since you requested the price of rear turfs. What tires do you have now on your 7500? For the sake of the 4WD, you need to keep in mind the ratios of the tires front to back. You probably will need to get matching fronts if you get the rear turfs. I do know that the bar-turf tires I have on my 7500 are a smaller diameter than the turfs, both front and back.
AC