power steering, power breaks
RATS, beat me to it.....
As to OP ? yes they all can be added, however, the stock systems are for crap and if you going to spend the $$/time/EFFORT you maybe want to upgrade while you at it.....
The simplest upgrade for steering is the Borgeson upgrade search threads here on it, it's basically a bolt in......
as for power brakes, you really want to add a Hydroboost setup, as it runs off the power steering pump for assist, and as anyone knows vacuum sux, so don't go there....
A/C is more of an issue, you going to have to spend some bux, as the only setup that seems to make sense is Vintage Air/similar aftermarket installs, according to what I read here, I had a stock setup in my '72 but it was upgraded with modern comp. when changing to serp drive but kept the stock condenser and evap/housing but if bother to do all that, upgrade the BLOWER and wheel to a C4 unit, blows much better, so a search here for how.....
best of luck, lotsa projects over the next 20 years.....that's how long I have had my '72 ......



You can brake just as well without P/B; but the pedal effort is much higher.
Power steering is only beneficial when the car is at a dead-stop or moving very slowly. Otherwise, you don't really need it. (But, P/S is an absolute 'must' if you have to parallel park the car very often.)
A/C is not difficult to add, if you go with an aftermarket system. Trying to install a factory system in a non-A/C car would be a complete PITA.
FWIW: the installation of factory air is a very involved process and takes up several pages in the AIM. It's do-able, but it could be a real PITA as 7T1 states.
Last edited by Easy Mike; Feb 15, 2016 at 11:44 AM.
















