rpm to high throttle body bbk

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    1999 3.8 Larger Throttle Body Problem

    Hey everyone whats up. I recently found a good deal online for a 70mm bbk power plus throttle body. Well when I went to go put it on the blade or butterfly kept hitting my cars intake manifold housing. So the guy told me to use a dremel well I did and now the car wants to idle at say 1500rpm...