Pontiac GTO Evac Pump Kit - Got Vacuum For Your Hi-Po Engine?
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In order to operate correctly, the vacuum pump must have a sealed system to draw pressure out of. If so equipped with a PCV valve, the hole in the valley pan will have to be plugged. Since the car wasn't equipped with a PCV valve and had breathers in both valve covers, one breather would have to be capped while the other side was retrofitted to include a bung that would accept an AN-style fitting. View Related Article
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