Ive never gotton a solid answer on the SS suspension. Forgot to measure it when it was on the lift last time. I am gonna be doing some exhaust work soon (again) and will take measurments then.
I heard a few things, no SS had the GMPP sways, some SS had them, just the Indys had them and they all have the trailing arms. Mine was a very early build, 7/31/03 so I dont know if it has anything that the later ones had.
My suspension RPO is FE4 - Performance Suspension