If you don't like the static 7.83:1 and dynamic 7.32:1 and don't want to use different pistons you can use a thinner head gasket and shave the heads some,,,,just about your only alternatives with out a tear down and decking or pistons.
That CR does limit the cam selection 'some' but for what your wanting performance wise it will still produce plenty of torque with a cam like nitrowarrior is suggesting.