I'm pretty sure my car needs a heater core. Upon searching for one I have come to realize that one for ac and non ac are different. Every parts store I have searched only has ones for non ac, i was hoping someone here would be able to help me in the right direction of finding one for ac. Also, how much different are the two from each other? Would a non ac one work in the place of where an ac one should be? Thanks a lot in advance!