Factory ride height rear end 71 swinger

So then it would be pretty safe to say that all springs that have no positive or lowered ride height would have the same ride height, but would have different spring rates. Meaning they would be more firm or soft riding. Now from the comments it seems that new stock ride
height springs would raise the car about 1-5/8 to 1-3/4 inch from where the 50 year old springs are currently at. 21" to the fender lip on my 26 inch tall tires and 20.5 and 21.5 on previous comments with similar tire height. At that point its probably safe to assume that if you
have 40 or 50 year old springs and replace with new stock ride height springs it would give you a lift of just over 1.5 inch. and if your not putting slicks under the back of your car, you can probable avoid high lift and high rate springs unless you want the rear jacked up and or a rough riding street car.