A body superstock springs

hello all. are superstock springs generally regarded as a drag race straight line or general all rounder? please excuse my ignorance! i am putting together what you guys call a kinda autocross as apose to strip car.its a b/b 1.18" torsion bars tubular u.c.a and loki or bilstien shocks when £ allow......i rebuilt my saggin rear leafs with some strips from a commercial vehicle:wack: and these loads better as they were almost horizontal but i always had it in my head to swap over to somthing propper! theres a set on a uk forum,claims new old stock 40 yr old would save a packet from shipping, are these worth having or is there somthing better for track / autocross use etc, cheers nathan.