Check out "leaf springs and the anti-squat line explained" by Kevin Wilson, on you tube. He will recommend Caltracs cause he's a suspension guy, and wants adjustability. I think the o.p.can get by with ss springs and good shocks.
I will be doing mostly street driving and on occasion some drag racing so probably the SS springs will be in order. Also, I just put QA1 double adjustable shocks on the front and rear so i suppose those will suffice?