Just so you know - the description "factory A/C delete" is not correct. There were no "A/C delete" cars built - only cars with or without A/C. If your car was built with A/C then your firewall is different than a non-A/C car. Therefore; the non-A/C heater blower motor box (commonly listed on eBay as "A/C delete box") will not fit on your A/C car.
You would have to modify the firewall to fit the non-A/C heater blower box. If you are considering installing a Vintage Air kit, I would call them and ask their advise since it appears your car is an A/C car.