Maybe i have never said this, but my Cougar had a very soft ride when we bought it. Even , was dangerously softer than a plow. I have changed the shocks 3 years ago. The front of the car is soft but nothing rare, but the rear of the car is very very hard. But i need to say, im feel safer when i do a fast maneuver. The problem here is when i add 2 passengers, the rear end sags.I dont like it, but i was wondering if there are a cure for this.
NOTE: I have never changed the springs...
Mex..you answered your own question .....sounds like you need springs