if the mammoth is going to be driven cross country then a change would be needed, would be turning too many rpms for that diesel to be happy. if its being trailered, i'd hold off until after the trip.
That has my vote too and that is what we discussed, it will of course be trailered and we really can't safely do over 60 mph in it anyway.
And Glen... we will be selling the [edit] 5:29's
We will also be selling the 38's when we go to 42's, they should still have significant meat on them.