Nickel and diming

... me to death...
It's been one issue after another with this damn dodge ram.
Now I have a mystery misfire under load at around 1750 to 2250 RPMS. I can't get it to misfire just sitting in the driveway. It's random and sporadic. Usually in 3rd gear sometimes in second. Manual trans, 95 ram 1500 , 5.2 Magnum. New plugs , wires , cap , rotor , TB has been cleaned , new 02 sensor, TPS, IACV , maf sensor , brand new battery, alternator , 180* thermostat and water pump. New breather, grommets and PCV . It has been gradually getting worse. The plugs look brand new. Any one have the same issue with a cure ? Lol thanks