#4448308 heads have any potential?

Before thinking about going to a bigger valve or sinking money in a cast iron head. I would stop and save up more $ and buy an aluminum head. I know this sucks, waiting and being patient, but you will be so far ahead if you do. It will also give you room to grow if your performance goals increase (as they usually do) Buy once, cry once. I’m forced to run cast iron, but if I wasn’t, I wouldn’t spend a dime on a cast iron head. I wouldn’t get rid of them, but I would let some one else sink money into them at a later date. :):)