spring relocation

Anybody out there done a spring relocation lately? Mine is a 72 swinger and am having trouble hooking up. Tried various tires but am limited to tire width. How much of a head ache is it to gain the extra 3 inches with a spring relocation kit and is it really worth the trouble?
72 limelite swinger, with 69 340 x heads 30 over forged pistons, steel crank, .509 purple cam, 870 double pump, 150 hp nos power shot, pertronics electronic ignition, 727 with stage 3 shift kit, manual valve body, holley blue fuel pump, line lock, frame connectors, drive shaft loop and exhaust cut outs.