I agree with Henry...an 80-series is "out" for him. Wheezy engine that loves to overheat, etc, etc. He tows...has the killer 4.7L already. If he got an 80 he'd hate it (like the two I've had).
Keeping what he has could be converted into a rig of his needs. I have a good friend with a very nice 4Runner (I have a pic somewhere) and it does quite well on technical trails though my 100 has a clear edge overall.
I think if Henry needs added capacity and a tad more capability then a move to a 100-series is in order. If the Runner suits his size now and can run what he needs then I'd give it a go.
He should steal my buddy's Hundy that he just marked down. It's loaded to the gills and ready for anything!
http://forum.ih8mud.com/az-copper-s...j100-roklimo-clone-goes-up-sale-tomorrow.html
Wheezy engine? Loves to overheat? B^%$s$%^ on both counts. I live in Vegas which is FAR hotter than Tuscon, yet our 80 has never once overheated. In fact, my wife prefers the 80 over our 2003 V8 4Runner hands down. According to her, it drives better, the engine is smoother, and the AC blows colder. In fact, everyone who rides in the cruiser mentions how cold the AC is.
Enough already with your personal crusade to prove that the 100 is the best 4x4 ever in the history of man. It is a joke. Period. My 4Runner will go far more places than your 100 ever will for several reason - I'm not afraid of pinstripes, smaller width and length, better IFS, more nimble, etc. And you know what, our stock 80 has already made it through two different rock gardens that the 4Runner couldn't due to the articulation and lockers. Just save it, everyone on the internet is tired of hearing the 100 slob fest.
To the original poster, best bet is to go drive a 100. It has the same engine as the v8 runner, only it is far heavier so MPG will suffer. Do you need more interior room? If so, get the 100. If not, stick with the 4Runner. We thought about selling the 4Runner for the 100, just to get a little more room. But we finally realized that we were gaining little and giving up a lot.