In past two years have replaced thermostat and water pump. Now running hot. on 1996 Dodge Ram Van 2500

Running heat helps.

Asked by for the 1996 Dodge Ram Van 2500
poss blockage in cooling system suspect radiator
1 more answer , 2 more comments
Due the age and history I suspect the radiator may not be doing the job as it should. Also if it has a fan clutch that should be tested also.
Also had radiator rotted in November.
I still would ot rule out that the radiator could be cause of problem. You may need to have a technician check your car for a diagnosis. It may be money spent wisely rather than swapping parts on a guess.