Heater delete, but not AC?

[El Campo]

Prob one of the strangest ideas that has been on here in a while! In the process of rebuilding the whole AC system on the 72 with factory air (and no I do not want to go to a Vintage Air system on this truck) and got the idea of deleting the HEATER but not the AC. In South Texas it doesn't get cold enough to warrant a heater in my project (not a daily driver, for sure not in winter) but I want the AC. Can I take the heater core out and fiberglass the holes in the box and after repainting it no one will be the wiser? Would I get more air flow for the AC or not? And is there parts of the stock box that I could take out then to save a little weight and make simpler? Thanks for considering and commenting