273, he said he grabbed his calculation charts and calculated 10.5-1 up to 11.0 to 1 with the pistons I plan on using. No zero decking mentioned. That blew my mind. Literally. Was not expecting that at all.
I think he needs a new calculator, he's about a point and a half high. and no way with a .050 gasket, maybe a shim gasket.
Those pistons will fall in bellow deck.