I have the dash pretty much out. I have loosened the the bolts that hold the heater box in. I can get the 2 rear bolts off the that opens the box,but I cant get to the front 2 under the cowl. But it seems like the a/c piping coming out of the heater box inside the engine bay is holding the box in place .I cant pull it out. Is there a way AROUND discharging the a/c to get the core out ? Can I discharge it myself ? Its a 97GT by the way.