What pistons do I have?

Making a BUNCH of assumptions regarding volumes, deckheights,and head gaskets, i got those pistons at 8 to 1. But with work, decking the block, thin small bore head gaskets, deck some cc's out of the heads, i think you can get to 9 to 1. Can be a good piston for a street build IF.... the bore works, is tight enough, for hipereutectic pistons.