These trucks or any other truck can vary a lot on weight,depending on how they are equipped.The easiest way to find out for sure is to weigh it at a public scales.Just about any town has a public scales close by ,such as a truck stop or gravel,pit,etc.If it aint running pull it onto the scales.That way you will know for sure,what it weighs.So many things,such as engine size,trans,bumper style,etc. effect the weight.Most 1/2 ton trucks of that era weighed in between 3100,and 4000 lbs.