4bbl running rich.

Edelbrock 650. New on a 340 punched to 413. Not even on street yet. Running rich. Have reset floats. Put in recommended needle and seat. Better, but Still rich. Any thoughts on cause? Oh, and have worked timing a bunch. It will idle at 700 with a decent cam. Don't remember specs on it. Could look it up I guess.
What fuel pump? Fuel pressure? Those carbs like 4#.