spring relocation inboard help

My 72 swinger with 265/50/15 rubbed before my front sway bar. I have a 3/4 offset mount and shackle kit too.

Enough squat or body lean, and my tires still rub just slightly.

Rear rims are 15x8 with 4.25 backspace on an a body 8.25" with drums (56.75 wms to wms).