Les,
Pulling and rebuilding the heater box is one of the 'rites of passage' in 2002 ownership ? Seriously, it isn't as bad as people make it out to be. It's a very satisfying fix once it's all back together and you've got a strong blowing HOT heater in the car. I use my '74 as my surfing vehicle here in Northern Cali, so a good heater is a must for thawing out after a morning surf session. That car gets exposed to all of the bad things (salt, sand, saltwater) and keeps on ticking.
Good luck,
John