So i have a new holley 650dp on a 306 crate motor. What is a good street strip jetting on the car? Im running very rich.

 

you probably have a very large cam causing low vacuum at idle ..resulting in a power valve coming open to early .. study power valves and their affect and how to go to a lower # valve .. jetting should be close from the factory .. most carbs run good rite out of the box ..

 

I have a e303 cam. Is that really large? Thanks