440/505 rpm limits

The one I built for my buddy in Washington St. twist his to 7000 all the time, and that's after I bitched at him for twisting it to 8500. But it does have Bill Miller aluminum rods and it spins up real fast. 11:1 and .600 lift custom cam.

Thanks , I dont mean that I`ll run it to 7000 all the time , just dont want it cutting out at 6200 .