340 Max HP Potential with X/J heads?

The one thing that Cast Iron will never be is Aluminum and that is based off of having the ability to repair it..... Things happen and if you go sink alot of time and effort into Cast Iron heads leave no doubt there is power to be made but if you ever have an issue such as scorching a head you have a boat anchor...... And that's where the train stops for me. I have been there and done that. Never again on a performance application if I can help it....

JW