68 dodge dart 10 inch slicks 700 + HP leaving on trans brake at 4500. Question super stock springs or cal track bars and split mono leaf springs which will give better over all performance. Thanks for the help.  

Well,
The S/S spring, pinion snubber, and long drag shock setup has been a Mopar standard for eons now and it works well. But what I am seeing is that quite a few are swapping from this setup (not just from stock) to the CalTracs and finding measurable improvement in performance. I was a little sceptical about the mono-leaf aspect, but they seem to work quite well. I think I would go the CalTrac route myself.  

No matter what set up you use the 10" tire is border line with a brake, a 4500 converter and a 700 hp motor.
Looking at your user name I suspect you are using a 700 hp 440, which will only make for a larger problem with the huge torque this motor makes.
With this kind of power I would consider a four link, and if possible a bigger tire.  

Yeah, I was kinda thinking that, but answering the question more as it was asked. Hey, Dart440 are you trying to fit into any specific class rules as regards tire and susp. configuration? The four-link offers the best performance and maximum adjustablility, but they are running Cal-Tracs on cars that are in the 7's too! If you do go that route use their full set-up with the split-mono-leafs and Rancho RS9000S shocks.