[Car Nut]

Sandy,

I think you are running an independent rear suspension with upper and lower control arms. Don't remember for sure.

With an IRS, a firmer shock or, in the case of an adjustable shock, a firmer valve setting would likely help. If the bushings in the control arms are too soft, consider a more solid type, such as high load bearing urethane vs rubber. Sometimes the bushings used to hold the differential in are too soft too. It is also possible you could have a soft bushing that has split.

Check out your shocks first and see if the have adjustment knobs first and start there. You could try jacking more spring into it like Bob B suggests. If the ride height isn't tolerable you could replace it with a stiffer spring.

You could also try not doing any burnouts ala Don.

JMO