Need rear wheel backspacing suggestions for 65 valiant with mini tubs and inboard spring kit

I used the Percy's wheel rite to get my wheels centered in the wheel with no rubbing. It does take a bit of time to set up a simulated tire on it and then set up the back space but worth the time. I did not mini tub but did move my springs inboard. my rear rims are +24mm with a 5.95 back space. . Rear rims are 17 X 9.