I have a saggy rear but only on the drivers side. What would cause this? The car has been on jack stands for a while and I finally put the wheels on so I can roll it around and now the drivers rear is sitting about 3 inches lower than the passenger rear.

This is a 1966 Galaxie Convertible. There was a thread on 1965 ride height but depending on where the measurements are taken, it won't really match the 66 as the rear wheel wells are different.

I don't really care about what the stock height is, I just need to correct this issue. Would shocks cause this if one were bad? more than likely it is springs, I would guess.

Mine measures roughly 27 on the passenger side and 24 on the drivers - that is from the ground to the middle of the wheel well. I do have the Mustang Bullit wheels (17" - with 55 series tires - I think the width is 235).

How expensive are rear springs? I was going to do the rear suspension last but I guess that just got accelerated. How hard are these to change - I have done fronts but never rear before...

thanks
Stacy