what do you all think about an 89' 4runner 4cyl 5spd towing a suzuki samurai? what are the towing capabillities of my 4runner? it has 31's and stock gearing, the clutch is pretty new, and the 22re has 220,xxx miles but never burns an ounce of oil....could the old toy handle it? the sammy would probably be on a tow dolly and i would haul it from south jersey to connecticut, so there aren't any mountain passes or tough climbs....would this be the end of my clutch/tranny?

your motor as it wears doesn't come down in the power band. Where the factory put it is where its best and wants to be. You will find its the most optimum hp output at rpm is at the hwy speeds you drive. Altering the final drive with excess tire dia, will perform the same function as changing the final drive ala gears. Everything from the rpm's in all the gears to the speedo/odo being off it is the same thing. And yes when there is only 100hp to start with every little bit matters.