I know I am gonna catch Heck for suggesting this BUT, I would put Monroe air shocks on it, 30,40 psi will raise it about an inch & that little bit of pressure will NOT hurt the ride or the upper shock x member.
Agree with what csk said. For around $100 bucks Monroe Air Shocks will fix your problem. I ran them for a number of years on the back of my 69 Dart without any issues as did most guys back in those days. Raised my rear end up and gave my car a nice rake in the rear. Trick is not to blow them up to 100 lbs and use them like that all the time. I use to fill mine to about 60 or 70 lbs. Or order a new set of spring from ESPO Springs and Things with a +2 inch lift.
