I would say beef up the springs a notch and get bigger swaybars.

The cuts on the front wheels are inline with the fender, so imo they happen during severe spring compression.
If they would happen during hard cornering, I think you would see small bites taken out of the tire.

I would certainly start working on the fender lips to get rid of any sharp edges.
Any chance you can/want to 'pull out the fender a bit, without distorting it ofcourse?


What diameter torsionbars do you have installed?
How many leafs on the rearaxle?