My heater core replacement writeup with pics:
http://www.toyotanation.com/forum/t209136.html
1994 Toyota 4x4, 31x10.50, 22re. <- to undergo high compression 7MGTE swap whenever i finish building it.
1986.5 Toyota Supra- 300+rwhp. (capable of over 400, but i haven't tuned it yet)