would this work? http://www.ebay.com/itm/Specialty-Pr...%7CMake%3AFord

 

Springs do sack out eventually. While you could install alignment bushings in the upper ball joint to compensate, it may be wiser to replace sacked springs. The spring and shackle bushings may be shot as well. If you do replace the springs, the truck may need an alignment anyway, but you won't know until after install. You might try contacting ATS Springs, they're a forum sponsor and they know springs, often chiming in on posts like your's with advice. They would be able to help you figure what you need in terms of spring rate for your application and use.

 

I'm with boarding. It'd be a good idea to start with fresh springs rather than trying to evaluate a situation with 20 year old springs in the mix.