Retiring from law enforcement and coming out of Drag Racing retirement. Haven't driven since 79. Looking to compete SS/EA 10.90. 1974 Duster Is worth it to go with a 4 link full kit, shortend rear end, or will spring relocation and notched frame suffice? Using 14 32's 4:30 gears 408cu.in. auto trans. I been watching and taking notes. looks like both work pretty good.