metric car im lost

[racin 1]

i have ran a metric malibu for 4 years won a bunch of races, sold it and built a 79 monte carlo. put same springs and shocks as other car, but will not turn anything like the malibu. just wondering what spring to run on this car, rear % cross% left% lf900 rf1100 rr200 lr 250 all 11in. springs need some input please.
does anyone have any ideals