Dwight from another site. These are what I put on my '89 with good results. Lots of folks I know use Monroe sensatracs.
" As you know, the original type electronic struts are only available for the Northstar cars now. If I were replacing the struts on your car, I would use the GM 88945832. This passive strut is also sold as ACDelco 503-352. It has a good combination of firmness without being too harsh on normal roads. The rears are 22189456, ACDelco 580-6"