[decooney]

Feder,
It may not be related, but i'm wondering if you purchased the rocker arm assembly new for this motor and was the valvetrain geometry checked in detail before you fired the motor?. I have that same type rocker assy and they sell one for Edelbrock heads and a different set for original style Ford iron heads. I can't see what heads you have there in the pic. i.e. final valvetrain geometry, clearances, binding, etc... just a thought.

I'm interested to see what you find out what the real root cause is with this combination of Genesis block, Crower Cam, and that particulary rocker assembly. Please report your findings. Thanks, and Good Luck.