I'm running one on my 99 Dakota. I started out with clear tubing and saw oil going into the plenum. I fine tuned the idle and cleared that up. There was oil weeping from the grommet around the vent elbow that would not adjust out.
I replaced that elbow with the gold colored vent cap ( the 70s style) and the weeping was cured.
I found later the original elbow was 50% blocked with casting flash.
I could not believe how well the idle and driveability improved.