Oh totally. The only spec for the suspension height I'm aware of was for the front, and as I've said before even that spec pretty much goes out the window when you start running radials instead of bias ply's.
The SS springs are really designed for drag racing though, so, if drag racing isn't the primary use of the car I would look at different springs before I looked at having the SS springs re-arched. There are much better spring options for a street car, especially if you don't want the ride height the SS springs give you.
