[68pont455]

lost my old trw catalog and the new sealed power catalogs dont provide this. i dont want to pull the heads to measure this number. does anyone know what the relief cc's are for this piston. its for a pontiac 455. the original trw catalog listed this number so that a builder could figure compression accurately without buying a piston and cc'ing it. hope someone can help out. if not i will pull the heads and do it. thanks