Hey guys thanks for the help. So here is what I ended up doing instead of the $600+ at BJ's after shipping tax.
Took my lead from Scassidy and just went with a standard Chevy radiator with measurements that allowed minimal changes to the truck. I already removed the cross braises up front. Then I used this solution for the LS1 steam vent plumbing: https://www.youtube.com/watch?v=nIFeFLVIuo8