CC's of the dish? If the short block is right in front of you on a stand you could set a thin steel scale across the piston & measure the dia of the dish (A) and slip feeler gauges under it for the depth (B) then 3.1416 X (1/2 of A) squared X B (ie .050") X 16.387064 for the area in CC's or wait for someone to post who has that # handy. Several stock 360's I did the pistons were ~ .100"ish down in the hole (not good).