Wow Greg, a bit cynical?
Greg is correct in most of this. However, if you are going to run a Strut type car there are things to be careful about. If you lower the chassis too much you can play hell on the roll center. This in-turn increases roll moment. With very heavy springs you still will not be able to keep the car from rolling or even jacking. You really can’t spend too much on shocks, but for IT racing you have to budget it. You can hit a point of diminishing returns so to speak. Most cars run more spring rate in the rear which seems to help. Ask a good chassis engineer and they will tell you it doesn’t matter once the rear tire is in the air. Once the tire is hanging you are at 100% weight transfer and the front springs are all that matters. Spring and shock lengths matter, you don’t want to bottom out or bind either one. Because you are fitting a poor camber curve you will need to run lots of static camber, but this will depend partly on tire choice.