[dwydendorf]

When you drill into the side of the block for the water drain be sure to locate it away from the center of the cylinder and as close to the intersection of two cylinders as possible. Also be sure not to locate it under any head bolts. This will give you more room to use a pipe tap to thread your drain. If necessary you can cut off a tap with an abrasive cut off wheel and grind a new lead on the tap.