I know that I reached the limit of the 68 un-silenced 340 air cleaner. The AR ratio’s would go rich at high rpm. Modified the base and the issue went away.

best of 11.24 at 119 mph 1.60 60’. 68 340 S Barracuda Fastback F.A.S.T [IMG]http://i67.tinypic.com/2mnnnnt.jpg[/IMG]