Same here , but mine doesn`t want to stop at 6200 , not even 6700 , "most I've had it !"
On a 500'' engine intake track air speed is great anyway , I`ve had 3 diff, intakes on mine , cleaned up and matched victor beat all others I`ve had on it , a cleaned up and well massaged weiand is extremly close and no seat of the pants diff in feel .