91 350 SDL Heater Core?
 

I am losing coolant in a significant amount and my temperature is running somewhat high. I am adding a gallon of water a day when I drive the car. My question is does my car have a Heater Core or something similar that I can lose coolant out of? My passenger Carpet had a very small wet spot on it, but when I looked under the car I saw a very strong stream running from the back center of the engine area. Car runs fine though a little warm. If this car doesn't have a heater core what else could it be? Thanks in advance for all information.....

Phil Lambert :confused: