I too would use what I had. If the stockers lose their profile, get a stock replacement set from these guys....
http://www.eatonsprings.com/

A good leaf spring system is hard to beat for simplicity, low cost and effectiveness. If the springs try to wrap up on acceleration, adapt a set of Caltrac bars or other anti-wrap device. I'd use leafs down to 10 flat at the strip, if it was just a hobby type car.