[Mark Yacavone]

I gave up on attempting to baffle the vent hole through the pump .There's just too much fluid flying off the direct drum , at the the RPMs these things see, in race cars.
As Russ said , I move the vent to the rear. There's a flat area up top that had a vent on the very early models. You can tap a hole to 1/8th pipe and add a fitting and contain any fluid easier there.
Pull the tube out of the case up front, and J-B weld it up.