For what it is worth, when I put underdrives on my Mark VII a long time ago, one of the unacceptable side effects was that the A/C struggled to keep up in traffic (Fort Worth, TX, black car). This was because both the compressor AND the mechanical fan were slowed down. Off came the underdrives!I had a set of U/D pulleys on the car. Been there 20 years and i never had issues with cooling or charging. Car ran 188* on a mechanical gauge no matter what conditions. Very reliable.
However, with new combo, i figured i wanted to go with reliability over every single HP. I'm also reinstalling A/C, so that was a driving force for putting the stock pullies back on as well.
However, i wonder if the additional flow from the Edelbrock pump would allow me to run the U/D's with the new combo and still stay where i want to with cooling. Of course, unsure how this will affect my A/C output.
A decent electric fan setup, pulling more air through the condenser may balance it out a bit more.