So why would a brand new streight out of the box from summit Weiand Action Plus intake not fit right, Should I call up summit and return it or just get the thicker gaskets and try again?
If you tried three other manifolds and they fit fine I would say the Weiand was not made right. I would return it and either have them swap for another one or get something else. The Edelbrock Performer RPM and RPM Air-Gap are current state of the art designs and are considered the best dual planes availabel today.