Oil Color

Running too rich will darken oil in a hurry. Take it out, get it warmed up, run it hard on the way back to your garage and pull a few spark plugs and take a look. Post some photos here so we can see. My buddy had the same issues with his 383 in his Bee. When he switched to the 440 he had the same issue. He used the same fuel pump. His fuel pressure was close to 10# and Edelbrock/Carter/AFB style carbs can only handle about 5#. A regulator fixed the problem. Oil stays clean now too.