I'm curious, what is your driveline situation?
Auto or manual, Stock case, regear diffs?
A buddy of mine has been running the recenter rims with tires on his IFS 1st gen for now.
22re, Manual, Dual Cases, 5.29 gears locked f/r.
He does surprisingly well down the highway (had trouble in the Runner keeping up with him at 75mph!) and awesome off road, he is currently doing a SAS (ifs was great an all but he got a deal on a SFA out of an 80 series).
I like the idea of a heavier weight rim/tire combo, I feel that helps keep the truck rubber side down