Julio, Are you running air bags, and have you ever tried unhooking your front sway bar? Your sway bar rotates through an arc and your front suspension travel is linear. This causes it to bind, if you unhook it your front will be able to fift more. My buddy unhooks his sway bars for Jeeping and he set his up with cotter pins. It only takes him a minute or two to hook or unhook his sway bars. Also I see from your pic that your car is squating the rear pretty good. I will never understand this but I read some stuff on setting up suspensions. They say that if your rear end squats then your not planting your rear tires as hard. This makes no sense to me because a rear end thats squating looks to me like its carying some of the weight thats usually on the front of the car and this is going to really load down the rear tires good. They use the equal and oposite reaction stuff in there explanation and say that as the rear squats and pushes the rear suspension down that the oposite reaction to that is the rear suspension is pulling up on the rear tire. When I look at it from that senerio it makes no sense to me at all. But if I look at it from this senerio I see it. If when you took off your rear suspension actually tried to raise (pushing up on the car), then the oposite reaction to this is that your rear suspension was trying to push the rear tires down. I have seen anti squat kits for F-bodies that change the angle of your lower control arms so they aim more upwards than flat. These are supposed to push up on the rear of the car as the axle housing tries to rotate clockwise. This is supposed to help F-bodies hook up harder.
This is my GUESS: If the front end rizes more than the rear then weight is transfered to rear of the car. If the rear or the car squats then the extra loading on the rear tires is d/t weight transfer only. As you get closer to pushing up your rear suspension instead of squating your actually using some of the torque thats twisting and trying to lift your front tires to push down on your rear tires and increase the loading on them. Plus you still have the extra loading from weight transfer. Like I said this is my best guess because over all its pretty confusing.
Also watch out. I made some massive sub frame connectors for my car. Even with them things in there my new hard launches have already caused me to put some big old waves in my B-pillars.
Nice pics and good luck at the track: Jason