I've done a taco 3.4 into an '86 runner. It wasn't that difficult.
I also had the complete taco for parts.
If you know electronics, you'll be fine.
If you have all the taco, your ready.
Remember the taco exhaust is on the same side you'r runner has
its transfercase and fuel cell. It'll have to cross over somewhere.
I'll help you with questions if i can.
dan