It has a PCV system with a Mummert baffled valley pan. I used a PCV valve from a 289 Mustang and runs from the base of a Carter AFB through the original Ford Y-Block PCV pipe back to the valve. I did unplug it, check to make sure that the vacuum was pulling the correct way and also did it while running just to be sure. It did not affect anything.

Thanks!

- WOT

As a follow-up, it was the rear main seal. Engine shop backed their warranty and with a little orchestration, I got it to a shop and they changed it out with no charge to me. Enjoying driving this thing now finally

Thanks!