273 Hi-Comp Piston Deck Height

hi, the 235/273 had a domed piston. the dome was .150 tall, the correct deck heights are; flat part is to be -.011 below thedeck, the dome will be
+.139 abovethe deck.this piston had 2 valve notches. sounds like you have the later 273.180 2 bbl pistons.