Setting up A/C car for Heat only

I may have misread the above^^ but a heat only control panel does not control the coolant. Only AC cars had a valve.

I would attempt first to check out and get the AC controls working. They will operate the system fine if so.

OP: You have a factory manual? You can download it free at MyMopar. That and other ones got there because of some of the guys right here. There are two volumes, the Chassis and Body manuals.