Think some here are way overthinking things. While I respect what Phil has to say on the subject I don't think or see how a stiffer rear segment is gonna help things at all. Look at the way his cars all seem to act at the starting line. They all share one thing n common, a penchant to go up. Not anything wrong with that at all it is the way he like them and how he chooses to get them to work. Kinda off subject there..lol

I have seen your car leave a number of times. I think one of the biggest if not the biggest issues are one, you need a better rear shock. One that can control the separation as it should. Two loose the lowering blocks. If you need them to obtain the ride height you NEED then you already have the wrong rear spring imo. You need to be able to control the separation at the rear and the shock is what is going to do that. No a stiffer rear spring.