Oh, ok.
I got the Hughes 1199 kit with a .620 coil bind.
They are 1110 springs with a custom retainer allowing the lift and 310lb @ .550
Might want to check them out.
This is from their site:
"MAGNUM SPRING UPGRADE KIT
INC SPRINGS, RETAINERS & LOCKS TO GIVE .620" COIL BIND W/ NO MACHINING"