Always hard to tell from a picture, but the erosion between the cylinder bore and the water jacket are enough to stop me from just slapping it all back together. Overall though the surface isn't clean enough IMO, the indentions from the rings, the pits from the former HG, scratches.... and so on.
Connor, were you loosing coolant or did the coolant have an excessively high pH before you pulled the head off or before the HG blew (if it did ever blow in a big way)? As clean as that piston is compared to #5 it's been seeing a fair amount of water.
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