I wasn't trying to burn ya Gearhead, I appreciate your help as I mentioned.

sorry if I somehow did, unintentional man.

If the vacuum diaphram ruptures and the seal is working, no oil will be sucked, but if the SEAL fails, the action of the diaphram pumps the oil that gets by the seal, outboard through the vent holes, different vents than the gas portion, but next to each other

The upper gas portion is like John mentions, but the lower portion works differently

If you have the manual, check it out, it all makes sense when you trace it out

Again I appreciate your help, sorry to sound like a smart arse


49-53 Chevrolet Shop manual, engine assembly, page 6-89, fig, 112, seal #27 "oil seal"