SO will a stock 5.0 upper restrict a tmoss lower

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I believe that the stock upper flows in the 190-195 cfm range roughly from what I`ve read in the past,and a properly ported stock lower will flow approx 190-200cfm,(more if you really go nuts on the porting), depending on the runners flowed,runners 1 and 5 being the lowest.So it`s a good match.