I am thinking about not running A/C in my 48 chevy 1/2 ton. I live in Tennessee and the weather can be humid in the summer months but I still don't want to lay out over a thousand to have A/C. I am thinking about a heater defrost units. I was wondering if anyone else had any feedback on the A/C issue or suggestions for a heater A/C unit. I do not have the original heat unit and am looking in the aftermarket for parts.