Have replaced distributor, spark plugs, timing chain, carbarater, distributor cap, plug wires, all electrical components on the firewall, valve cover gaskets, intake manifold gaskets, and coil. Still has not run properly since last year. Have had it to three mechanics and no one knows what to do. Am ready to sell it, because I really don't want to put more money into it. No one knows what is going on. It will start but won't continue to run. Before I had put the intake manifold gaskets and valve cover gaskets on, it would run at idle, put when under load, would stall out.