The change in the main jet will depend on the size of the PVCRs under the power valve. You can take drill bits and measure the PVCR size and then with a little math figure how much bigger the mains need to be. It won't be exact, but will get a good close starting point for the rest of the tuning.

Power valves and PVCRs are good tuning tools. Rarely do they need to be eliminated, at least on the primaries.