Originally Posted by MouseFink
The main advantage of 1.7 rocker arms over 1.5 or 1.6 rocker arms is faster valve acceleration rate off the seats for more cylinder filling for increased low end torque. The valve duration would be increased slightly by four or five degrees.
The increased flow and HP produced with 1.7 rockers at high RPM HP is negligible. The low end torque increase may not be worth the effort it takes to fit the 1.7 rocker arms
Your post seems to contradict itself but I agree that at this level you'd be much better off sticking with your 1.6 rockers and maybe looking into a different cam. The one you selected is a great cam for a mild budget engine where you're not concerned with max power, BUT since you are concerned with max power you should probably consider looking into a custom solid cam- after you have the rest of your combo together of course.