First question "have you looked" at the shop manual. There's a 73 (which came from the guys on here at FABO) posted for free download at MyMopar.........two sections http://www.mymopar.com/index.php?pid=31
Thanks. I have been after a 73 or 74 chassis manual for a long time. When I get to a PC I'll check that 73 Dodge chassis manual and even the body manual out!
There were a few dead links to a 73 Plymouth on FABO that I could never get to work. I've been using a 72 manual for most things but I know the ac setup is different from 72 to 73