explorer 8.8 in an a-body: experience needed

Apparently you do since you have changed front pads twice in a 60/40 system,

Apparently you are completely clueless as you have no real idea just how worn, or not worn my rear pads were when I decided to replace them. You also have no idea what caused the rear pads to get to the point that I felt they needed to be replaced.

140,000 miles in 20 years. Fourwheeled in 10 states, in mud, snow, rock, sand, you name it... Crap gets run past the pads, scoring them deeply. They were replaced long before they actually wore out from stop and go driving.