i'm not really sure how you'd end up with a set of TRW L2315's down the hole .100+, unless the block was MUCH taller than the 9.98" spec.

as i recall, i decked my block around .035 to get the pistons to .018 above the block(crank stroked to 3.388).

based on your current deck clearance, assuming a typical BB OE chamber volume of 88cc's, and using a steel shim head gasket.....you'd be at about 7.8cr right now.