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I run the ACC big block 26" in my 71 with a stock clutch fan and factory shroud. It cools my 440 in the SC heat just fine with the AC running. No experience with their electric fans but the radiators are good.
I am no AC expert by any means but it sounds like it froze up. How do you have the temp cutout switch sensor connected? It needs to be insulated real well so engine heat does not affect it. I found the insulation supplied by classic sucked so I bought a roll of good stuff and insulated it...
Great information. I have relays on the headlamps and concealed doors but never thought to do this to improve blower performance so I did it today.
Used a relay with a mounting tab and mounted it to the heater box with one one of the resistor screws. Looks stock and man what an improvement. It...
43 degrees with the windows open on max AC is good. Max recircs inside so if you close the windows it should drop more. The weakest point we have on these systems is the weak factory blower fan.
Same kit in my 71 and I also charged it today. I was able to get 30 low, and 200 high with three cans. 40 degrees out the center vent.
Did you put a vacuum on it first and let it sit for a while to verify no leaks?
This looks like what you need.
https://www.originalair.com/73-74-b-body-mopar-engine-compartment-upgrade-kit-318-340-360-wstock-parallel-flow-condenser-r134a-stage-2-small-block
All the positions are controlled by vacuum so first ensure the main vacuum feed going to the control is connected. The switch will then open/close doors when in each position. This pic is the rear of the heater controls on my 74. The white check valve is the feed from the engine compartment...
AC cars also used one. My 70 Charger/Coronet service manual shows it in the vacuum diagram. Is your 70 Charger an AC car? I kinda wonder it it shares the can or has separate ones.
Have the same ACC in my 71. Looks factory, cools properly with all accessories. I also have a complete set of glass in the car that fit perfectly. No complaints here on their products.