340 Running Temp
MOPARJ
Are you running your fan with a clutch? If so make sure that it is working properly. I had a friend who had one on a Cuda 340 that was bad in the sense that it wasn't turning the fan fast enough at low speeds to cool the radiator. At cruising speeds the temp would come down slightly. Ended up the jel inside the clutch was breaking down and not flowing outward as the speed of the engine increased to make the fan turn faster. Changed it out and the problem went away.
Something to check out!