[Collinsboys]

Frank,

Just occured to me, and you may have checked this already, but...
Check to make sure your fill port is higher than the manifold. Mine was close initially due to hood clearance and as tall as these BB pigs are in the compartment I overlooked this basic point and created an air pocket, it "appeared" to be high enough, but was not, just another thought.

And remember, there is "no replacement for displacement", don't you just love the sound of a big block in the morning? Smells like....victory!

Good luck.