Correct - and that is where there is a lot of throttle linkage - very crowded. I
looked and hooking up a PCV line to the carb just isn't likely. There is a finger's width between the end of it and the cross shaft for the throttle linkage. Even if I managed to get a PCV hose on it, it would be rubbing on the linkage and probably fouling my throttle. Not something I'm willing to risk. Only other real option is to drill the manifold (not sure a good idea on a 63 427 manifold or plumb into the S&H air filter base - and I don't think it's big enough to give me clearance from the carb.
Interestingly enough - my breathers are staying clean and not getting gooped up at all. The inside of my
oil filler one looks spotless. I'm not even getting any
oil spits or other mess outside of them. Engine is staying very clean. Running copper exhaust gaskets that I took great pains to be sure they sealed up tight. Everything else is away from the exhaust and most of it insulated or shielded.
I'm just going to call it crankcase fumes and stop wondering about it. More an issue of curiosity than anything.