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Nobody can tell you what your CR is - you'll have to CC the heads (on the engine is the easiest) - making sure there is no air in the chambers - with piston at TDC and determine the final compression area volume.
You can also do it by measuring everything separately, but you'll find it is a bit more work (needing a plexiglass plate) - measuring the head, measuring the block valve/relief area, the head gasket area and then subtracting the dome area.
Good luck!