Spring Rates & sizes

[Brad1970]

This is for a 1972 Pontiac LeMans:

Front:
Afco 5 1/2" x 9 1/2" 650lb rate


For the Rear Spring rate I'm gonna run about a 225lb or 250lb rate.



What size (example 5 1/2" x 11")? If I'm not mistaken I have to run a pig tail spring in the rear, but not 100% on that. Who makes a spring that is linear for the rear like this in that spring rate?

I want the car to be level & not running at stock height.

The type of suspension setup I'm looking for is sporty enough for a very occasional SCCA Autocross but comfortable enough for excited street driving as this car will be my daily driver.

I don't mind a little sporty feel to the suspension, but not looking to rattle my teeth outta my head or jar my kidneys so hard I pee myself...

Sorry if I've missed anything...

I'm going to be running the Savitske Street Comp 2 plus setup up front & a Global west rear adjustable setup.

Maybe Bilstien HD shocks or a single adjustable shocks...