a/c block off plate
BMR makes one but you'll have to cut it for the heater core lines
Shouldn't cost more than 20 bucks.
They sale these things for around 70 or 80.
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I picked up a piece of 1/4 inch lexan today to redo mine, same price as metal sheeting. Should be interesting.
i did mine this way so i could retain the heat as well.




