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01-26-2009 10:03 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.
John's ride to the cemetery, his beloved Billings OK bus, The Baby Elephant!! Traveling in style!! As his service was starting I couldn't figure out what the music was, heavy on a flute in a jaunty...
John Norton aka johnboy