They work great. You can see the black draft tube coming out under the ignition shielding attached to the intake. The early small block has a shaft in the block behind the distributor that it blots to that vents though that oil baffle. The newer blocks don't have it I believe starting in 66? The other end hooks up and vents to the air cleaner base.
In this picture I had tape on the end of tube.
Some may not see your tape, So
Also the tube then hooked up to the air cleaner base. On earlier versions to a road draft tube routed under the car
