Super Stock Springs...do they make that much of a difference

I don't have SS springs, what I've got is 8 leaves per side, the extra two being a main leaf with the spring eyes cut off and the second leaf, restacked with a new bolt through them all. No snubber, because there's no provision on the chivvy dana i have. Rides ok. I'd like to see how it launches sometime, But I can't hook. :toothy3: I'm going to try to make a set of homemade caltracs thing is, caltracs bend the spring back to where it should be.... what if the spring never bends? I guess it's about tunability? change the length of the pushrod to get a different launch? I know, the springs gotta go.