Thanks for the reply!

I realize that they were not particulary made for high performance, but I was not looking for extra high output.

I was more thinking along the lines of the small valves and small runners being well suited for decent fuel mileage and good flow velocity to have decent low-end torque.

I was unable to find any specs on the runner volumes of these heads, but I suspect there somewhere around 160 - 170cc.

I would really just like them to operate well between 1000 - 3500 rpm.

Your thoughts?