Well, it wasn't $350, but I bought this whole truck for $600:
1998 C2500, 5.7, NV4500, 14 bolt full floater with 4.10's. Just needed an ignition module and it cranked right up and ran, drove, even had cold A/C!
Wasn't much left of it when I got through but the scrap brought $210, so I guess you could say I paid $390 for it. Not too shabby.
Gotta be on the hunt!
Richard