iron heads for a 408?

Picked up a set of 596 360 heads today. Bought them off ebay and went and picked them up. Payed $10.00 for the pair. I will clean them up and check for cracks on monday and then flow them to get some all stock numbers. Then It will be cut for 2.02 valves.

What do you think I could get these heads to flow in fully ported form.

According to what the above numbers say, when fully ported, wow, that can make for a mean street machine.