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  1. 1964-1974 Tempest, Lemans & GTO General Discussion
    My 67 GTO has 400ci/ TH400, fairly stock. Came with 4 wheel drums and no power brakes. I added a brake booster from AMES and noticed that when I stomp really hard on the brake without letting up, the engine RPM drop significantly, well below idle, and sometimes die. Car idles @ 850 RPM in...
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