Tex,
We downloaded the spreadsheet in the link below to help us get our 81 Malibu rear suspension setup and working correctly. We found it to be extremely helpful.
It is just as important to get the front suspension setup and working properly. If the front suspension isn't working in concert with the rear suspension, results will be less than desirable.
Good luck.
http://www.patooyee.com/calculators/4BarLinkV3.0c.xls