found them. read this.
http://www.camaro5.com/forums/showthread.php?t=135527
http://www.camaro5.com/forums/showthread.php?t=138488
"You need the Long Tube Headers to Properly Scavenge the Spent Exhaust gases from the Chamber and Keep Exhaust gases from backing up in to the intake manifold during Overlap.
As much fun as this sounds like, it is a BAD IDEA.
Do the Headers Now or you will be tuning Twice, and Tuning Cost Money."
Ted jennetty