I bought my Challenger it had non working AC & Heat.

I'd really just rather have working heat.

Aside from removing the underhood stuff, what needs to be done under the dash? Where do I source this stuff?

Also, the Heater control valve is leaking. But it appears this is an A/C only item? I've looked through the FSM, it appears that non-AC e-bodies don't have this?

Thanks for any and all help.