750 Edelbrock issue

Not one Edelbrock carb I’ve ever seen has liked excessive fuel pressure. Holleys, yea they can take a little more but the Ebrocks blow the needles off the seats pretty easy in my experience. I’ve tuned a few and always the first thing I do now is set the floats correctly (even if brand new), and make sure it has no more than 5.5psi of fuel pressure. That’s step one.