I have a pair of the closed Chamber P5249769 heads available at less than cost , they retail at $1000 can each , approx $750 us both heads are $1500 can , these are designed for the 59* stock lifter angle , have 18* valve angle & 65 cc chambers , these heads use TD rockers , long stem valves & hav edual bolt pattern for W2 or stock headers , they have the W2 oval intake port , they have been ported in the bowl to remove the ridge behind the valve & shape the valve guide , but have no been significantly enlarged
these are a serious head & are not cheap to set up But will make a lot of power
