cal-tracs question

I was thinking about building my own caltracs because I don't have the money for the new ones, plus I have access to all the materials needed and the tools. What springs should I use? I know monos are good with caltracs but a bit pricey. Also, are they stiff enough to support the car on the street? The car is a 66 Dart GT, engine will be a 470 BB shooting for high 10's. Can you use caltracs with stock multileaf springs? I just have all the materials to build them and thought I could save a few bucks, or should I "spring" for some SS's and ditch the cal-trac idea?? Should I just make the cal-tracs and buy some of the cheap JC whitney $60 springs and call it a deal. Thanks for your advice!!