Well, I had spent some time 'going the other direction' and was looking to put heavier springs on my C1500. The most I could go up to was 3/4 ton. The 1 ton were too long to fit.
So, my thinking in turn is the 1500's would in turn be too short for you. Might have to at least extend the hangers there. However, if you could get a set cheap enough, then you could try and let us all know how it went. Also, depending on the truck version (1/2, 3/4,1 ton) the airbag fitment is different in minimum and maximum length of the bags and where they mount on the frame and axle. All that could be a challenge achieving your desired ride height and comfort level.