Some say that the front struts/springs off of a Pontiac Trans Sport or its "sisters" will fit an a-body car, they also claim the springs from these vans are heavy duty(heavier spring rate).
So if this is true, can someone install these springs on an a-body and expect a "Stiffer" ride due to the spring rate designed for these 5000lb vans?
Will a car sit higher with these springs installed?

I'm not sure about the rear springs, whether or not those would fit...

Any input would be great!

E.R!