AC Options (71 Duster)

I have a 1970 duster without ac. I have got a stock ac system that I planed to install.
will the non ac fire wall accept the stock ac system ?

I'm not up on post-66 A Bodies, but from what I've read, AC and non-AC firewalls for the 67-up are pretty different. There are ways around that - knee knocker or a new heat/defrost/AC unit from some place like Classic Auto Air for example.