Chassis problem

Rear springs have 2800lbs Ss spring numbers on them. Has the same amount of springs on both sides. If I remember correct the right usually has more leafs in front. Just bought a set of cal trac mono leafs. Going to take cal track of my sons car and give it a try. On a job in Hawaii but will tackle son as I get back

if a car w/ a 10 point cage is still breaking wind shields, the cage must be a piece of junk !
I still think the guy would know if his car is twisting. look at the doors, rear bumper, they`re correct in relation to the body. if it was twisting that bad, the doors would show it in the pics, and they wouldn't close right when he got back to the pits. and, would change how they close every run. been there done that as they say .