Leaf spring vs. 4 link???

[Boerger]

I am currently restoring a 70 Camaro, mainly for a fast street car/ strip car, but I don't want to rule out standing mile and autocross. The rear frame rails and wheel tubs are pretty rusted out, so I am going to replace them with mini-tubs and new frame rails, moved in a few inches.
I am a beginner at suspension, and would like to start with something simple to tweak on, but after reading this http://http://www.racetec.cc/shope/, I think I am more confused than before. haha
My question is, after doing all that work, should I bother to add leaf springs back, or just replace it with a 4 link setup? Is there a simple 4 link setup doesn't require alot of calculations?

Thanks in advance
Chris