Because it's a street car. No racing. SS springs aren't the thing to have for that application and due to modern technology and production issues with the MPP springs, they really aren't the thing to have for racing anymore.
If the OP already has the S/S springs, I’d just use them.
Then a trip to Summit Racing to look at shocks that are 1-2 inches longer with the same on extension length.
As mentioned, the Comp Engineering shocks will do fine in the street.
