68 barracuda suspension

Hi, first post here. I am buidling a 68 barracuda, I have a new dana 60 and am about to put on springs and torsion bars. I am thinking Hotchkiss springs and firm feel 1.12 torsion bars. My questions are these: will I need a drop torsion bar to make the ride height correct with the Hotchkiss springs. Are there other cheaper springs that also give you good handling. And is 4.5 x 8 good backspace good for this application. Has anyone done this yet that is willing to share some information. Thanks Larry