Distributor O ring/ gasket part #

Yes to pcv system on engine in car. This is on new sb build, engine is on a stand. I noticed none of the orings Ive tried fit. The issue isnt the potential oil leak, its that the dist shaft sits that much higher outta the pump drive.
Yeah, yours is obviously not right. Easy enough to troubleshoot though. However, I was referring to the original post. Maybe start a new thread to avoid hijacking his.