I'm going to pop it back off today (when my son goes down for a nap...) and I'll snap a few pics of the PCV set up.
I did drive the truck on two test drives and although it seemed to run really rich, it idled fine. Yes, it did backfire a few times, even igniting the fuel inside the carb.
I'll seal up the gasket surface and see if I can pull the carb apart and inspect the PV.
If that fails, I'll check out the power brake diaphram.
