Dedicated AutoX/Track Spring Rates

[///MSH]

I've read a ton of posts regarding "spring rates"....unfortunately, I didn't find anything that focused on dedicated race cars. No street driving compromise!

So if your insightful-of, or affiliated-with a dedicated race program, please REPLY!

Specifically, I'm looking for the following information:
1) F/R spring linear spring rates for dedicated race car (track or AutoX)
2) opinions on the ideal F/R split
3) advise if the rear is true Coil-over or OEM configured.

NOTE....just to keep this thread on point. There's plenty of data on all the "off the shelf" options.......I'm looking for those who have custom-configured their setup.

FYI....Once I can select the correct rates, I will order a set of DA Penske. Mid to late season, I will post some reviews for all to see.

Thanks!