G'day Hanyzy, I'm running a 1999 extra cab rear bag ute with same donk setup as you're looking at mate. It is great fun, sounds beautiful, puts a smile on my dial every day it fires up, But :-)!
Very serious coin has been injected into cooling overhauls for my beast, $3.5k to be precise and have just now I believe finally sorted it out, almost :-) Not trying to put you off it either but NA's need a bit more boot/fuel in headwinds and hills to hold 110-115kmph which you'll find raises temps significantly/scary:-(
I believe will all will be sorted via turbo or super so that the boot/fuel is backed off a bit!
Please do test it @ 2200rpm highway for 15 mins and then 2500rpm for another stint and see if she runs away before buying :-)!