I wouldnt put this body on your 84 for alot of resones number one is before 73 all the frames were flat your 84 has a big step up under the cab so your cab wouldnt set real good on the newer frame. Big resone number 2 is the 84s front tires wouldnt fit under the narrow 49s front end. If i wanted to modernise i would change the engine,trans and rear axle. I think there are to ways to look at this. Its stays all original and is used for what it is or its upgrated to a new truck with a old looking body.
