Need to get new springs on my 68 4 door, and may crank up the torsion bars a bit, or buy thicker one

Nice, and they're made in the US of A !!
Bought em. Will post before and after pics. Now on to shocks and torsion bars! I am going to go up one diameter. Shocks, I am hoping for some help and advise for the best ride for the buck.