First post this in the diesel forum their are a lot of guys overtheir who have rebuilt 617's. Second I have never heard of a 617 breaking a crankshaft? What caused this and how did you determine the crank is broken? Maybe a main bearing was starved for oil and seized? You can get a used engine for a lot less that is probably the way to go.

__________________
2006 CL500
1969 280SE
2023 Ram 1500
2026 Genesis GV70
2007 Tiara 3200