Stupid question? Can I replace my torsionbars and leafsprings for coilovers?

Or you could buy the Hotchks rear springs, they will lower the rear.

Also ESPO will make lowering springs.

No one has mentioned front leaf spring hangers with a higher bolt hole location. You can buy or make them. A 1" higher hole will lower the car 2" at the bumper. AR Engineering? I think Mancini Racing carries them.

Also old school way is to flip the front hangers upside down but you must elongate the mounting holes, not recommended but zero cost. Check your pinion angle after.