Front end alignment shims ,although a 69 70 should not need them ,they are sometimes used to align body panels ,about the only place i have ever found them for body panel alignment is at the bottom rear of the front fenders to the rocker .
Got the TCP tubs that are shaped like originals these add 2” and combined with the narrow leafs from Evergreen allow a 315 tire with enough clearance to avoid any rubbing. I did narrow the rear seat backrest, removing a section from the middle and reinforcing the joint. I also have a narrowed axle because I wanted the wheels to have dish.