BLOCK DECK HEIGHT GAUGE
This is what you use to assure all four corners of your block are the same distance from the crankshaft.
Remember, all the work on center to center rod length, piston compression height, and correcting the crank stroke, are out the window if your block isn’t square.
The tool can also be used for actual measurement if set with a micrometer standard (which is available but not included with this gauge).
Tool will adjust to any deck height up to 12 inches.