Great project!! Depending on what exactly you're wanting to build, you have lots of options. On Chevrolets, the C series is two wheel drive and the K is four wheel drive. The 10 is 1/2 ton, 20 is 3/4 and 30 is 1 ton. I built this kit about 23 years ago, and I may be wrong, but I thought that it came with a 14 bolt rear axle and 10 bolt front axle which would be a common 3/4 ton set up. We used to build a lot of 1:1 trucks back in the day. A short bed would have came from the factory as a 1/2 ton, but we often put 3/4 and 1 ton axles under half ton trucks. The badging and even cabs were often changed as well. So, unless you're trying to build a factory original, you have lots of options. Interestingly enough, I had a friend who had a short bed step side with 3/4 axles under it that looks almost identical to the way your model looks now. Looking forward to seeing more of this one!