Adjustable valving shocks, tires with a big sidewall.
Coil overs are a great upgrade but are a big job (as far as shocks go), and large can shocks that hold a lot of oil, or shocks with reservoir cans. A lot of guys run the Rancho 9000XL series, the bigger Bilstiens, Fox shocks, Kings, or even duel shocks.
2nd gens with torsion bars....Keeping your control arms flat across with nominal lift or drop will give the best ride.
Fresh rear leaf packs with a good arch from eye to eye makes a world of difference.