A/C or no A/C in the Scamp?

F.I.Y. The firewalls on A/C equipped cars are different than non-A/C cars. A/C cars have a much larger hole for the blower fan on the right side. The A/C heater box is also much larger and heavier than it's non-A/C partners. My Scamp was A/C equipped and a non-A/C heater box just won't fly without major tweks. Thusly, the reverse holds true. Aftermarket A/C's are much better. My new A/C is the new 75/80 A/C. Go 75/80, roll down windows.