Did I mention that the exhaust was only held on by a ball of weld? The other stud is broken off in the head. I had to grind the weld ball off to get the muffler off.
Head had been recently cleaned up..
Cleaned it up a little -
Bottom end is up next..
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This may help someone in the future - Someone please correct me if I'm wrong - I read around and found a thread about a guy who put a stock cylinder head on a 61mm cylinder. The compression was increased and he ultimately had to go with a 61mm cylinder head to get the compression back to around stock levels. Continuing with what xlint said before, doing the opposite (61mm head on stock cylinder) will lower your compression due to the extra cylinder volume in the head.