Rhe off set shackle and hanger kit moves the springs in to the same depth as the wheel wells. And you can still get an exhaust on with the factory fuel tank.
These can be made and installed easy. I have some of the original kits here if you need pics. It moves the springs in 1 inch per side. The kits have the nuts welded on the wrong side on the front mounts. There is a better way to install these without slotting the frame. I have done many. This would be the the way to do your car and not do any mods to the frame or body except for enlarging one inner hole on each side of the front inner side of the rail.
This car came to me with one of these kits that was done in the early 70's. You can see they didn't even move the perches on the rearhousing. They drilled a hole 1 inch over and slotted the perch for the U-bolt. When I got this car it was a drag car with 10 inch slicks on it on 9 inch wheels. On a lay down back seat car this would be the way to go. These are not being used on this car I am restoring it to original.
I do have a mini tubbed car myself. I like big tires . The difference is 12 inch wheels with a 7 inch back space minitubbed . 10 inch wide wheel with a 5 inch back space with just the springs moved in. 8 inch wide with a 4 inch back space stock. Steve