Dunesick1

Looking for help guys, I have been all over the internet looking for info on changing out this heater core and looking for the replacement. Everything that I find appears to be for non ac. All of the pics and explanations of how to access do not look or sound like mine. Everyone refers to five studs on engine side of firewall and my box has more than 5 mounting points. The top fasteners are bolts that go through from the engine side of the firewall some of the lower fasteners appear to be studs from the interior side. Has anyone changed this particular heater core? Thanks in advance for any help everybody.