I bought a cylinder shim set on e-bay, but I haven't recieved it yet. raising the cylinder will decrease compression, but that is easily fixed by removing head gaskets. I have noticed that as I decrease the crankcase volume, (by cutting materiel from the rear) I need to add head gaskets. This makes sense to me because as you raise the crankcase compression, you are forcing more air into the cylinder, and thus raising cylinder preassure, so you need to add head gaskets to get the cylinder preassure back down where it was to achieve the same ignition characteristics. I am getting ready to go run the engine with the Tee Dee cylinder right now, and just for reference the piston is about .0025" ABOVE the deck right now. I read somewhere that a 0" deck is what you want, but it would be fun to do some testing and find out exactly where it is happiest.

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