Are you going to put the inner door panels back on? If not, just cut the inside metal out and leave the exterior skin. Picture below is not mine. It is from "Chris' GT Build" here in S197forum.
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Yeah haven't made that decision yet. I'm currently working on getting my heater core out and it looks like I really don't want to have to reassemble the hvac just for the luxury of air conditioning. Though we will see.

