[1969 GMC]

I may have a chance to buy what I think is a Dana 60 front axle. The vehicle it's coming off of is a 1980 Chevy K?0. I have a ? because I don't know if it is a 3/4 or 1 ton for sure. The GVW is 10,000# (sticker in glovebox, registration), which makes me think K30. It also has 4 springs in each spring pak up front. It doesnt have any fender emblems, and the front wheels are regular steel wheels, while the rear wheels are duallies, which made me think either 3/4 or 1 ton SRW converted to DRW. Axle is covered in gunk so I couldnt check for any casting #'s. My friend's dad bought the truck just for the rear axle and the nice flatbed it has, and has no need for a front axle. I think its a Dana 60, but even if its a 44, I'll probably take it for the disc brakes. Can anyone help? Here's a pic: