Kieth Black block

Buy your block through the machine shop that will be checking it and building it. Make sure the machine shop does everything in house. If they have to sub anything out don't use them. Buy a raw bare block so you know you don't get a repaired return.

Also the shop that does the motor should Have a Rottler. This is the only way to correctly machine and square deck the block. By using the mains and cam tunnel for the reference.

Remember the block is the foundation. I had a shop ruin two X blocks. That was a lesson I wouldn't want anyone to learn through. expense