With the pure volume that showed up, it sure looks like an across the board type of deal going to C15s, probably because of emissions. I'm wondering where the transmissions went...surely they would not leave the old manual body Allison in with a C15?? Someone like me would not pull an engine which was perfectly good, but I've learned that the government isn't really someone like me! Worst case, OH kit for a DD isn't too bad, anyhow.
We have a 3116 sitting in the shop right now which looks for all the world like it has not been started since remanufacture. It was partially disassembled. We took it down to look because the overhead was screwed up, and made us wonder what else was screwed up. A friend bought it along with a 6.2 which also appeared to be unused. I also have a C7 which does not have the paint burnt off the manifolds....but ECM is missing. Plan to use it to replace one in a truck which has natural ventilation added to the block, so we have enough parts to make it go.