RE: recommended vs. suggested vs. needed
The list dealing with the heater core pretty much contains what Justin previous listed. Heater core $517, Water Pump $303, Upper Heater Hose $79, T-stat $87, Coolant service $70.
Water pump T-sat, coolant... I figure I can do. The only thing I have never replaced on any vehicle is a heater core. How tough is it? I'm pretty good with a screwdriver, Crescent, and ball peen hammer.