Would springs from a 98+ WS6 car work on an LT1 car??? I know the LS1 springs are stiffer then the LT1's.

 

Yes. The springs are interchangable.

I believe though that the ws6 springs are 360in/lb while the stock lt1 front springs are 310in/lb. The rear springs should be the same. I doubt the spring rates will be that noticeable. Someone else will have to back me up on that statement. I'm not 100% sure. If the WS6 springs are not an upgrade over stock LS1 springs, then they woulud actually be softer than what comes on a LT1 car.

 

yes they would work, but remember: the ls1 cars have an advantage in weight. the engine weighs about 100 lbs lighter due to it's aluminum block. but if you're willing to try the experiment, i have a new, barely used (about 3000 mi) set of front only slp springs. 50 bucks and shipping and they're out the door.