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

The 1" block is what I want for my rear, I just did the RMS upper control arms and adjustable strut rods A+++, the car actually drives straight and takes bumps without bumpsteer well worth $700 for them two components. I agree the whole swap thing is like $7000 to get here and that's just the front, mind you, it would feel like a brand new car.
Was the control arms and strut rods for more and better adjustment possibilities?