I had the previous version (very similar) running with 160mm Bombers (long) and 150mm revs.
With the bombers it can be too slack for anything other than all down.
With the standard shock it’s about 67-68 up front. With the 160’s slacker and can wash out on flat turns if your not on it.
I ran a longer e2e shock from an Alpine with the 160’s which compensated perfectly. Did alps/mega and loads of UK stuff on it. Now I’m not using the bulk of the bombers the revs are on it with the original shock. Back to factory standard fine and perfect 🙂
By all means get the bushings as an experiment but not sure if it will work.
numbers don’t make a bike 🙂