Not here to start a senseless argumenatation but how come Prostock and Nascar teams and pretty much every other maximum performance application you can find anywhere runs aluminum heads then? They are at a level of money is not an object and if an iron head would make a fraction more power they would use it regardless of repairability.
I don't know for aure but any head MoPar made after the W2 was aluminum for the 2 things that make then a choice over the iron and thats weight and repairability. That's it.
