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Old 08-03-2001, 11:59 AM
Posts: n/a
There is no OVP on a 75 450. Check the distributor and see if you're getting any advance when you rev the engine. I had a 4.5 with similar syptoms caused by a frozen distributor years ago. Not only was it slow, but the exhaust manifolds would "glow" bright orange. You can also put a vacuum gauge on it to check for a plugged exhaust.
Randy D.
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