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

There's a lot more to it then pulling the shocks and bolting in coil overs. The front aprons on these cars are not strong enough to support the weight of the car nor will the rear unibody shock crossmember. They'll self destruct. If you study some of the bolt in systems out there you'll see how they address this issue with a custom K-frame up front , and weld in crossmembers etc. in the rear. Gerst, Magnumforce, Rms to name a few.

Not cheap or easy.