Block out of square

The machine datum hole was located on the bottom of the block on the oil pan rail/surface...

From looking at a block, here's my best guess on the machine datums to locate the manufacturing hole from... This on one side, there should me a similar set on the opposite side which I didn't have complete access to this block to rotate to take pics of those, but you can figure them out by looking at a block:


Here's my best guess for the locating pads on one side of the block, there's a set on the other side:


DSC09514 B2.jpg


Front locating pad:

DSC09517 B2.jpg


Rear locating pad:

DSC09516 B2.jpg