Cusser
+1y
"It does have a new radiator & new water pump "
If radiator is new, thermostat is new, and all the air is truly bled out of the system (not so straightforward, many have failed to do this), and all the fan shroud is in place, then the question I have to ask is: does it run hot (1) in town, or does it run hot (2) at highway speeds? (1) is indicative of bad fan clutch, (2) is indicative of bad radiator.
Myself: I have an aftermarket all-metal 2-row radiator in my 1988 B2200, 209K, Arizona.