You can but i wouldn't recommend it. The stock LCA uses a combination of the K-member, the torsion bar, and the strut rod for support. The whole purpose of the coil over setup is to scrap the torsion bars and reduce weight. if you remove the torsion bars you also weaken the rear pivot point for the LCA. New LCA's made for the coil over setup puts a mounting tab on the front and rear of the mount, vastly improving the strength and integrity of the LCA.
If anything is worth doing, IT"S WORTH DOING RIGHT!