Once my 5.0 engine + 5 speed manual gearbox drivetrain and LSD 3.27 rear axle are ready for install, this will be the time to upgrade my suspension as every thing will be out of the car by then.

Coxracing and SL Market are offering progressive and sport springs:

http://shopping.netsuite.com/s.nl;jsessionid=0a0104471f4323b8e4463748415bb0faa8537a040293.e3eSbNqNc38Le34Pa38Ta38TaN50?c=ACCT1100 29&sc=2&category=5

http://www.slmarket.com/springs.htm

This car will essentially be a driver, so it should retain enough comfort on long distance trips. But I also want to occasionally get the best of my additional horsepower on track days. So, I’m looking for the best compromise. I was told sport springs may be a bit too harsh on long distance trips. Progressive springs look quite appealing to me as I’m told comfort is retained in normal use but sprigs get stiffer when needed. Or should I just keep my stock springs and fit stiffer shocks?

Thanks in advance for sharing opinion and experience!