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01-26-2009 11:03 PM #3
Dual-Port
Intake will work well on your 390,as Dave said use 1" spacer but spend a little extra and get the Swirl-Torque spacer,Summit has it put part#TRD-2431 in search.You will probably pick up some MPG.





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A belated Happy 78th Birthday Roger Spears
Belated Happy Birthday