There are no cracks in the head, that was checked at the shop. Also, coolant leaks out of both the left and right sides of the head, all the way along it, so it is certainly not the intake leaking, and I doubt one crack could leak this much water in so many places. All sealing surfaces were cleaned. The block was also checked for warpage, and was within tolerances. Alignment dowels were in place, and the head went down nicely.