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Out on the ground, the old box is used as a template to create a round block-off plate to the cowl vent. Holes are drilled and sealer is applied, and the block-off plate is installed under the dash, completely closing off the factory hole.
How To Install Air Conditioning

Out on the ground, the old box is used as a template to create a round block-off plate to the cowl vent. Holes are drilled and sealer is applied, and the block-off plate is installed under the dash, completely closing off the factory hole.  View Related Article

 

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