From talking to the guy he bought it from eagle imports and was going to have it fitted to a toyoda, it's been in his shed for 5 years but is uncertain of actual model .
As I've said motor was removed from a showroom hail damaged car that was written off , I do believe if it's the LBZ it would be a great buy but would need pulling apart and everything checked to be 100% satisfied all was ok , Duramax had some problems with the earlier models and some of them wouldn't be worth gambling with .
If I could be buggered I'd nick out and check the Vin no on motor to confirm year of manufacture, it's certainly cheap especially if it is a new motor .