Rear shock rub

Not sure of car but my 66’ with SS springs and 8-3/4 rear the shocks are super close.
Tanks Inc fuel tank.

My 72 Demon- SS springs 8-3/4 rear factory original fuel tanks- super close to hitting.

if you can, lower the tank So you can push it away more. BUT you need to put something between the tank and sheet metal trunk floor or the straps will pull it back toward rear as they tighten up.