Found this thread while searching; looks like I've lost some dowels too :-(
I am missing two of the the 11x18 dowels. There are 6 in this engine as far as I can tell; two between the upper crankcase and cylinder jugs, two between the cylinder jugs and head, and two between the head and cam case. These are part # 94301-11180
The smaller dowels, 10x14, go between the crankcase and side covers. Part # 91356-286-000
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