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I usually install the top two, with the gaps about 2.5 inches apart, centered around the wrist pin line. I put the oil seperator ring with the gap centered on the wrist pin line, but on the side oppposite the top two rings. The scraper rings are isntalled with gaps 2 inches apart and centered on the seperator gap.
But you know, I'm not sure how much it matters. Rings, and in particular, compression rings, like to move (rotate). Not uncommon for ring gaps to be lined up on dissasembly. I've been told this is more common on engines that were bored without using deck-plates.
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