[chiphead]

All good suggestions!
I went back and clearanced the chit out of the intake runners with a die grinder. I layed them back further after i took the below pictures and test fit it. They now clear the valley pan with no gasket. I added countersinks in the intake flange for the orange gasket locators. I also chased all the intake threads with a tap.

Responses to a few observations:
Intake bolt holes line up with no gasket installed.
I routed the PCV hose after I had the intake installed, so it shouldn't have affected things.
The valley pan was clearanced before I installed it without a gasket. .
The PO did make a reference to intake leaks with this RPM intake but I shrugged it off. This is the same motor that supposedly had years of carb problems with a tri-power setup.
No idea of engine history, can't tell if it was decked. Intake flanges on heads are stock. Looks like a basic ring and bearing job 30 years ago.

What else do I need to check before I try to put it back together?
How can I tell if the intake flanges are at the wrong angle?