Padre I know you're now focusing on your boost pressure as your issue. But you originally thought you might have a tranny issue and were looking at Circle D.
Are you familair with these guys?
http://www.transmissioncenter.net/6l...arts_6l90e.htm
They even have Supercharged SS's car (Jannetty built) racing down the 1/4 mile on their 6L80E tranmission page.
I'm always searching for new companies that build/upgrade Camaro parts.