Altering compression ratio?

[2_fast_240]

Ok, so ive been thinking about turbocharging or supercharging my KA here lately but it has 10.5:1 CR pistons in it right now. ive heard how different thickness head gaskets can change CR and that got me to thinkin. now im sure i cant get a head gasket thick enough to lower the CR to a boostable amount, but would it be possible to put a metal spacer type deal in there and just put a gasket on either side. Kind of like the opposite of head shaving. Someone tell me if there is a reason this idea might go terribly wrong or some factor im not considering because it seems like it would work fine to me.