Sorry, but I don't know much about goats, you might want to post a question over in the appropriate year GTO forum.
You setup sounds almost like the old breather tube cars, solid valve covers with a breather tube near the back of the block to vent gases from the crankcase but I can't ever remember seeing one with a PCV valve.
If you are looking for an aluminum valley pan with a PCV provision, Pontiac Dude sells them, I have one for my T/A.
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