For the spark plugs, don't use Heli-Coil. Find yourself a Time-Sert kit which has solid inserts and the proper seat for the spark plug to seal against. Go to http://www.timesert.com/ and look up which kit you need, then check Ebay.
ok cool thank you...
Man, I'd love to be able to pick up a first-gen like that.
I come across yotas all the time here at work not a lot of first gens but a lot of yotas and can usually get the for 1000 and under... If you know anyone looking for a 90 4x4 extra cab there's a really clean one here in my yard