A 416, eddy headed hydro roller motor at 11:1 with 1.875 headers and a strip dominator will EASILY do 575 at 6000 rpm's. Turn it 6800 with the correct cam and it will go over 600. It will idle at 1000 rpm's.
A solid tight lash roller will do 675-680.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
