S/S springs or CalTracks w/mono leaf???

Super stock springs have been produced since late 1967 as they were designed specifically for the 1968 S/S HEMI Dart/Barracuda program; hence the name, Super Stock springs. Anyway, Cuda SRT8, I have followed your build with considerable interest. Your workmanship is first class. Actually, your build is very similar to my GTS (6.1, TKO 600, Dana 60 etc.) except I kept the torsion bar front suspension system. The springs you have (3200 LB) are a bit heavy but still serviceable. I have the 2800 LB springs with Bilstein shocks, and they are excellent on the street. I don't get to the track more than once a year, sometimes not at all, but I put 3 - 4000 miles per year on the car so I do drive a fair bit. The point of all this is to say I think you're on the right track, but rather than use lowering blocks, if you have a spring shop nearby just take the springs in and tell them how much arch you want taken out. Most places are amazingly accurate. I've done that for several cars including my GTS and have always been very happy. Just see where the car sits with the springs as they are, and then figure out how much you want to drop it. I took 1 1/2" out of the passenger side spring and 2" out of the driver's side. I just tightened the driver's side torsion bar a little and the car sits perfectly level. Comes out straight as an arrow under full throttle, street or strip. Anyway, just free advice. Again I am very impressed with your attention to detail and good luck on the remainder of the build.