I kind of figured that on the top ring position, but couldn't see the valve relief well in the pic. .927 pin also makes perfect sense if I would have thought about it. It allowed you to move the rod up slightly which was a goal and of course a big weight savings over a .990 pin. Of course the down side is you had to pony up for Vasco-jet or some similar material to get the strength you needed. Big RPM cost even bigger $$$. Looking at this engine, you have that routine down . Good luck with the project.
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