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ONly thing I could find on Rock Auto, or Autozone was the one for the PCV, which is on the passenger side. None of the junkyards around here have any trucks with TBI's that I could snag one from. I guess I need to figure out a way to block it off.
Like 89GMC said, don't block it off as it supplies fresh, clean air to the crankcase when needed and pressure relief if blow-by is excessive or manifold vacuum low.
By the way, if that engine pic is yours, wow. Very nice sir.
As El tigre was referring to. You could block off at the air cleaner and insert a push air breather into the valve cover if need to. But don't block it off completely, it's needed
I wish that was my engine! Mine is really dirty from mudding. I'm collecting parts and pieces to rebuild it. I hadn't thought about a breather, but that would work.