The whole thing. Depending on where the crank broke, and what it hurt, you might be able to put a crank and bearings in and go again. If the block is junk just about every thing could be put to use. Intakes, valve covers, heads, exhaust manifold's and turbo, injectors. Most of just that stuff would be of use for a 6.2 guy looking to turbo. Pull the pan and see whats broke.