OK guys...help me out here...

[JoeC]

here is some comments for you Rob.
1966 427/425 hp, Car and Driver, August 1965 12.8 @ 112mph
http://www.corvetteforum.net/c3/supe...D66427-425.jpg

1968 302, Z/28 Camaro Car and Driver July'68 13.77 @ 107.39 mph
this car had dealer installed factory parts (2 x 4 cross ram and headers)
I believe that test Cobra came with headers on it.If you put headers and a dyno tune on almost any of the big block cars they would dip into the 12s.
A well tuned ZL1 Corvette or ZL1 Camaro may have dipped into the 12s without headers. Cars magazine tested Charlie's ZL1 in 1969 and ran 13.16 @ 110.21mph and it was later found to have a 780 vac sec Holley instead of the correct 850 DP Holley (no headers)


[Edited by JoeC (05-17-2001 at 10:45 PM).]