This is a genuine Cummins ISX / ISX15 Block, it came from a running engine that has been through the machine shop.
The block has received the following:
*Degreased
*Magnafluxed ( checked for cracks )
*All gasket surfaces sanded / broken bolts removed / head bolt holes tapped 
*Main Caps torqued and measured / sized
*Resurfaced
*Counter bores cut for shims
*Final assembly cleaned 
All machine work is done in-house. 
The block will come with 6 shims of your choice, depending on your desired counterbore height.
You can have your choice on which block you may need. 
570, 870, 871, CM2250, CM2350, X15
To order send a message through the site with contact information and I will reach out to you to discuss. 
Almost all blocks are machined and in stock and would be able to ship that day. If not I would need 2-3 days lead time.
Price is $3750.00 + Freight