Good looking Dart 423 Dak! How tight do you turn your stock magnum bottom end? I recently built mine and haven't had it to the track yet but it sure wants to pull up to 6,000 I just didn't know if I should turn it that tight.
Shift light light is set at 6000rpm so it probably sees 6200. Does it all day long. I was a little concerned about it too but from what I have read the magnums can take some abuse. There is 3 or more full seasons on the fresh bearings. Pistons, rings and rods have about 25,000 miles on them. Good luck with yours!