[racervette69]

 

[010752]

That's what these are designed for,

http://www.carburetion.com/holley.asp

scroll down to

85-453 Holley Marine J vent tubes

 

[Gordonm]

Under hard braking mine will want to flood itself out.

 

[Strider]

I run tall air cleaners and the vent tube in the holley carb is a standard diameter, not sure what that standard is but I found a stainless tubing of the right od and cut a few longer pieces off it.
I then installed a drill bit in the existing vent tube, grabbed the vent tube with a pair of vise grips and using a twisting motion pulled the vent tubes.
I then installed the new longer pieces with a soft hammer tapping them in.
This solved my flooding problems on hard cornering.

 

[Mattydale]

Here's an internal one...

http://store.summitracing.com/partdetail.asp?autofilter=1&part=HLY-26-89&N=700+-156849+115&autoview=sku


Holley numbers...

26-39 screen
26-40 whistle
26-89 whistle

The original Holley baffle was made of brass.
I still have a few.