I forgot to answer your question, yes your over tired! Why pull more weight than you need! Also the above Dart we don't know the HP cause it's never been on a dyno, the convertor is a Dynamic, No trans brake yet, he leaves on a 2 step at 2500, shifts (air) at 6500 clears lights at 7200! By the way that also is a cast crank! The convertor flashes at 4500! Later... John Lang