not sure if this applies, If i can remember right... in 94 the flat rate time to replace a heater core is like 30 minutes. there was a change in 95 to where it jumps up to like 5 hours or something like that. if that's the case, might want to check a few things first. I'd start with adjusting the heater control cable and doing a coolant flush. or just try flushing your heater hoses. That is if you cannot hear the blower motor running.