Trick Flow 190 Heads, hydraulic roller cam, and pushrod angle Question.

I assume the Poly does not have the 59 degree angle?

I think it's pretty clear that the 59 degree angle works well in 'street' engine, or more accurately, a non-high RPM engine. I think once you get over 6000RPM or so, you start seeing issues.

Of course, there are a few factors as play....in order to get over 6000RPM, you're most likely using a pretty stout cam, which has more lift, which further makes valvetrain life hard.