Originally Posted By 3XBlack6packGTX
Funny. I had a cap on it and someone told me that was wrong and must be left open or vented to breather cap on valve cover. Sounds like I will put the cap back on since my breather has only one port and that goes to my six pack air cleaner port. Thanks again. I think mancini's tilde me I could cap that port when I bought the single port breather.

Great advice.




I have several sixpack cars all have the breather/vent on the center's bowl plugged with a vacuum cap, no issues, left open is what the factory did if the carb was vented and there where no provisions or requirements for evaporation control....left open you have a greater chance of a carb fire, and with the faster evporative rate of today gasoline, it's just drying up faster in the bowl if sitting for some time, which leaves you with crusty contaminates to foul the carb's passages...something you don't need esp on a multi carbed vehicle

Mike