[miker98038]

What you want to watch in a y block is stopping the oil thrown by the distributor gear into the PCV connection. I blew 2 head gaskets in a row from detonation on #8 at 5000 rpm and 5 lbs boost on the dyno. Second time around we really looked, and found the oil in the runner to #8. But we’re talking extended high rpm operations, the headers were running red hot. A baffle welded under the aluminum valley cover solved it. Carefully done, with the vent holes way from that gear. It had a baffle in the grommet to begin with, it just wasn’t adequate.

The guys building y blocks for the engine masters are using windage trays and sometimes crank scrapers to try to control the oil, both for drag and mist. Same deal with race cars.

In those cases an oil separator is a great idea. But Ford probably wrecked more cars driving from the assembly line to the transport lot than ever got built with the Shelby name on them. And Ford didn’t use them on the late y block. All of which were 292’s. The 312’s were before factory PCV.