Baseline Spring Rate and drag-race tunning guide---
http://www.cachassisworks.com/Attachments/Instructions/899-031-226_drag.pdf- this is direct to the source. Chris Alston's Chassisworks. I have found this site to be very informative on drag racing information and supply of drag racing supply. from wheel tubs to full chassis this is your one stop shop.
baseline spring rate worksheet.- cachassisworks.com here is a direct link to thier .pdf