512 B1 heads HP?

B1 heads suck out of the box so just saying they are ported gives us nothing to go with to give you a horsepower number. Cam specs would also be needed as would compression numbers and I’m assuming the single 4 barrel intake the heads come with. It’s a good piece. I can’t even give you a horsepower numbers from my B1 headed 572. I know mine should by slightly over 600