Hello folks! Just got an automatic 330K+ 94 F350 Dually, that is having some severe smoking issues. Truck has a popping misfire sound under acceleration that clears up when in the top gears. Replaced the fuel filter, injector return line kit, and the thermostat. Truck also intermittently stumbles and stalls out when coming to a stop. And will crank but not start unless I play with the fuel tank selector switch. I love this truck and want to keep her, but for now, I'm looking for a motor. Going to hunt down a compression tester to rule that out. Video link attached.