is a CNC'd Pro-Comp. IIRC the chambers and the ports are CNC'd, the chambers being important because Pro-Comp left a lot of material in the chambers causing the valves to be 'low'
http://avengercylinderheads.com/
the CNC work might even come close to fixing them ?
but have you looked into Scott Cook's new top end system?
betchya $2 you guy is not aware of them
there'll be phantoms, there'll be fires on the road... and the white man dancing
