Greg ....
My '69 has factory (not dealer) a/c .... car was bought new in Phoenix, and has the factory HD cooling package. 3 row v8 rad, 7 blade fan (v8 ), with a fan clutch, and "a/c six type water pump". This last summer I DID remove that 7 blade fan & clutch ........ because, the fan clutch was working good ....... but, at 40 years old, I did not want it too come apart and ruin my (fresh rebuilt - new core) radiator. I made an adaptor for my water pump (used an alumn. fan spacer & hogged out the back side to fit my a/c water pump) .... then went with a FlexaLite 17" fan.
Before all that, I would run 180 -190 -195 ---- and so far still do. Not running my a/c yet ...... it's still complete & intact ...... just need to install new hoses. the old hoses 'weep freon'. My car also 'still has' the lower a/c close-out panel under the front bumper, and the a/c rubber seal across the top of the radiator (to make more air move through the core).
I think it would be easy to add the top rubber seal to any Nova..... and it couldn't hurt. I'm hoping to up-date my a/c hoses this summer (already have new drier, & POA valve, and 'POINDEXTER' has the a/c hose crimper kit, so, I should B golden). So, just to throw it out there ------- I also drive my car HARD (it goes pretty good ..... even better w/ my 390 on there now). hoping it still runs cool ....... just FYI
later, jim