Follow up on my heater core. Finally received it Core arrived Nov 15, so it took about a month. It looks to be the correct core judging by the in and out tubes.
Problem right now is that I can't get at the old one. Having a hard time removing the heater box. Unhooked AC, removed a lot of fasteners but it still won't budge. Must be a hidden fastener somewhere holding it. I have a Haynes manual. In this case it seems a little difficult to decipher.