Bought a '71 Mach1 - shock absorber concerns

[Luc Feilla]

Hi, I recently bought a 1971 Mach1 and am very excited. The suspension has me a bit concerned, however. Here is the set-up:
KYB Gas-Adjust shocks on the front and air shocks on the back. I don't know, is this acceptable? Air shocks don't seem to be a serious form of suspension, but maybe I'm being too critical. I feel like Koni's or Bilsteins are in my future. And on that note if I move to other shocks how does one achieve that "perfect" stance on a 71-73 Mach1? Shims or extra leafs? Thanks for any thoughts.

 

[351mach1]

Regarding stance: My Mach had been lowered and the rear leafs were about to break. I bought a leaf spring kit to bring up the rear end. I believe the front coils were cut to get the front height. I don't plan on adjusting the front height. You can see my before and after here:
https://7173mustangs.com/threads/frankenstein-mach-1-in-vegas.45926/post-464462

https://www.cjponyparts.com/cj-classics-leaf-spring-kit-mustang-1969-1973/p/LSK3/