i have an 1980 olds cutlass i run on dirt on a semi banked 1/4 mile track the car builder near me says i have too tall of springs in front therefore he cant set my cast and camber he says they are 12" and i need 11" im not sure if i have the right size  either the car is heavy 3800#  LF 1000   RF 1200  LR 275  RR 225 do i have the right sizes or do i change the fromt ones when i get the shorter springs??? thank you  

we are running a 75 malibu that weighs 3600 with spring rate of LF 1100 RF 1200 LR 200 RR250 with bilstien shocks all the way around. the car is pretty good at the end of the night on the dry slick.