[mr0077]

Many of you may already know this, but for those who don't, and are having a clearance problem between the hood and the air cleaner on their Cobra...

The 14" air cleaner on the '68-'70 big block Corvettes (and LT-1's I think) has the lowest generally available base for use on a single Holley carb. It is about 2 1/4" from the bottom of the base to the carb gasket surface, and is low enough that with a 3" filter element, the K&N Extreme lid will hit the air horn. This means that you can run an Extreme lid with a 3 1/2" element, a 3" with a dome-top metal lid (a flat or low-rise lid will also hit the air horn), or you can mill off the air horn to use a flat or low-rise lid or the Extreme top. Consider that milling the air horn with this base and using a low lid may cause turbulent air flow into the carb.

I have heard rumors that there is a drop base that has a bigger drop, but have never seen one.