[CustomCab66]

working on the firewall. GM conveniently left several punch marks where the recirculation door hole is located. I used a Q bit (.330) hair bigger that a 5/16 and i drilled each of the corners. used masking tape to mark the border. Test fit the heater box and finished the hole up with a file. The hole looks crooked but its not its just an illusion. Remember the pinch weld on the top of the firewall is an arc so its not flat. Everything lined up pretty easy. Evaporator box installed and tomorrow will cut the dash to accept the bezel. First time I will have ever cut a dash. I swore an oath to never cut a dash for a radio. I guess for factory air its fine.