Quote Originally Posted by JeffYoung View Post
Been looking for flow numbers on this manifold. Found a 572 cfm number for the two throttle bodies.

For the intake found 178 CFM at 28". Is that 28" a manifold pressure number? Or is it at a certain valve lift?

I have flow at various valve lifts as well and it is GOOD but hard to tell if that was done with the intake on it or not.

I've also seen pictures of the ports and it LOOKS LIKE the restriction that GM clearly just fill welded in stops less than 1" in. You may get some good gains with an IT legal gasket match/port job.
Can you link those pictures??? That is very interesting