I have a small block motor, the block is a 0010 4 bolt. It has no cast date on the rear of the motor in it's typical spot. It has a K 12 on the back near the cast number. There is nothing except 302 on the front ledge where the block codes/vin go. I found this cast into the right side of the block, I included a picture below, if you can help me out it would be appreciated. I sort of wonder if it is a DZ block, oh yea, it does have an 1178 crank.
Thanks for any input!