Ok, I have to chime in here.
swapping the whole harness doesnt seem that bad but what about splicing the 85 dash components into the 98 runner harness. i have mixed feelings about swapping the dashes i dunno swapping the dash would be easier but i like the 85 dash it is grey with not one crack.
I was just like you back in 1999. Then I said F it. And tore the entire dash, wiring harness out and all of the AC, blower box and even the crossmember out and tossed it. Then put in all the taco stuff. Really dont make this harder than it is, F the old stuff including the gage clusters and what not. Just put the whole Taco stuff in. I've dont it and was the first todo so. (Sorry for tuting my horn) but really its not that hard. IN FACT ITS EASIER THAN WIRING. Trust me. Let me find a pick and post'em up.