I have a W2 open chamber head, head number P4532693 does anyone know what the CC of this head is and is this a good race head for a 12:1 dome piston i have 396 stroke crank .30 over which makes 412 cubic inches I need to know will this head work with a dome piston were ported the head and flowed them on an indy cylinder bench and it flowed .305 and some change $ my buddy told me that with this head and the dome piston will make to much compression and will be blowing gaskets does anyone know if this is right or wrong any help would be great thank you very much....