Originally Posted by hemienvy
Has anyone ever turned the block upside down and grouted only the upper part of the cylinders ? Maybe 1 or 2 inches ?

You would have to use a block deck plate, then when finished drill through the grout for the coolant openings.

As a39 Coronet said you can't redrill it in that way. and if you do fill it conventionally TOO HIGH, you'll block coolant flow thru the block at the blind headbolt bosses. Maybe that is what's been conveyed and understood in his reply?