83 F-350 dump, Overheating w/plow
 

I have an 83 f-350 dump i bought last year to plow with. Runs great for a 27 year old vehicle. I have read in other forums that older ford models overheat when the plow is attached, but my OVERHEATS!! to the point where i drive about 5 miles and the needle pushed to its limit. I replaced the Radiator. Is there anything else i can do, to stop this.

Thanks