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I would also like to hear about any fixes/thoughts.
Exactly the same thing has happened to a friends 505 engine. The engine has not come apart yet but I will post here if we find anything definite.
Start with anything that can load the crank in the direction the wear is - assuming it is only...
In the Melling instructions it warns you check hole in the cap will accept mounting neck of the pump.
Check for burrs on the bearing cap.
Carefully file down the oil pump until it drops fully in to position. Be careful to keep any metal out of your new engine.
I mean only relieve the area of...
The eyebrow would allow the intake charge (or more of it) to flow out around the valve area near the bore.
If the valve is too shrouded it will restrict flow.
Be careful not to grind until the head gasket is compromised or you weaken the top of the block.
No the source vacuum and the reading would be the same.
The idea of running the PCV off the bottom of the carb is to share as much of the PCV contaminant across as many cylinders as possible.
Run the PCV and brake booster to separate vacuum sources.
You don't want any of that contaminant/oily crap in your brake booster.
You might need the brakes to work properly at some point.
A Demon is very similar to a Holley and gaskets/parts are interchangeable. It is kind of a copy just so you know.
Holley also post tech tips on You Tube.
There are plenty of tutorials on You Tube from good people who will show you what to do and what you may need to replace.
Basic work on a carb is not hard so it pays to learn yourself.
I think those Demon's have power valve blow out protection but that is not 100% effective.
Also they can dry out from sitting around and rupture.
Good point posted - replace the power valve.