Check the tech Archives around 2003-2004

I had a set with 2.19 valves and they went 280+ at .500 and I think about (correction-285!!) at .600

This was just as Edelbrocks were first coming out so probably 20 years ago. They flowed aabout as well as a bowl ported/cleaned up set of Edelbrocks. If I remember there were 2 sets Chuck at (correction: Best Machine) did mine and Dwayne porter did another set.

But they worked amazingly well for what they were on my 508 stroker, back when a streetable 600HP with wall to wall torque was considered a strong motor.