YUP HE IS S.O.L. !!!, When I filled my block to the bottom of water pump holes I oopsed. The head bolt holes are bilnd on my merlin II block. Closed off one side of the block. I used Muratic acid in it and got a small portion out. But in the I ended up cross drilling water ports into it and drilling trough the back of the block to go around the rear cyl. Worked like a charm using 9/16 concrete bits. But in the heads his s.o.l.