Recently I bought a 1992 Dodge with the 318/NV4500 combo. ( I knows his should go in truck section but seems to be more traffic here.)
If you hold a steady speed, it stumbles or bucks. If you either apply more or less throttle it instantly goes away. Fresh tune-up. No vacuum leaks. Tested sensors with scan tool ( OTC ) TPS reads smoothly. No dead spots. Any help is is appreciated.