['97ventureowner]

Going back to the late '80s and looking at your criteria, I'd say your only choice would be a Caprice. GM started doing away with rear wheel drive, (BIG MISTAKE IMO,)in the early '80s replacing models with FWD . By the end of the decade the only cars remaining that were RWD were the Caprice and Monte Carlo (until 1988). The Monte however is only 2 doors and you are looking for a 4 door. The Caprice was highly regarded as a good reliable vehicle as it was highly used as a fleet vehicle for taxis and police. They were mass produced and parts are generally cheaper and more readily available. The Caprice also came equipped with a 6 or 8 cylinder, which meets your needs for a 6 cylinder engine for economy. The cars are also generally easy to work on. Hope this info helps you.