A 1500 series 1/2 ton truck frame won't last 30 minutes with a front blade that wide not to mention the transfer case and transmission.
A Half ton Pickup will work best with a 7 1/2 foot snowplow. Your biggest difficulty with fitting a plow to a truck of that age is going to be finding or building a suitable wiring harness to interconnect the lighting systems, The plow controls will transfer easily from model to model, you might get lucky at a salvage yard though. If the plow did not come off of a nearly identical truck (88-95?? GMC or Chevrolet 1/2 ton) then you will have to purchase a "Frame Kit" from the plow manufacturer or again find the pieces at a salvage yard. You will also want to fit it with NEW HD front springs. Service the Transfer Case and Carefully check all Driveline universal joints and replace any which have even the slightest looseness! For best results ballast the truck with 500 to 700 pounds of anything in the bed to counter-balance the weight of the plow. I usually carry 10 bags of rock salt - but that encourages rust too.
Mark is leading you down the primrose path with that 10 foot business - the blade should be 4 to 6 inches wider than the truck when fully angled to either side. Pumps are a cheap enough at the yard, the important pieces are the frame mounting brackets and the A Frame, they take all the abuse and once bent or broken they simply never have the needed strength no matter how carefully straightened and welded they are. So examine them very closely before selecting which plow to purchase.
They come standard at six or eight feet, you need the eight foot one and get power angle. You may want to look into a bigger alternator depends on what you have now. Also heavy front springs for the extra load.
It should protrude on each side a minimum of 10 feet. Get one made out of silver, it'll last longer.
i have a stock 1992 gmc k1500 and i want to put a plow on it this winter... how long should the blade be and what other features should i look for?