I have a used forged LS6 454 crank, enough surface rust that it probably needs to be ground rather than just polished. It came from an engine that was pulled apart and sat for years. $300 in So Cal.
I also have the 7/16" dimple rods from the same engine, with .030" flattops still on them, $200
Cleaning the garage some yesterday, ran across these LS6 parts still here, complete rotating assembly, forged nitrited crank, 7/16" dimple rods, forged .030" over flat top pistons, and GM harmonic balancer, $500. Was a running assembly but I have no 1st hand knowledge about balancing.