Here are side by side pictures confirming my previous email. You can see how the screw that holds the cap clip on the dual point is in the same position on both distributors, but it doesn't hold the cap clip on the single point. The cap clip on the single point is attached to the distributor further below and also one post further left, making it appear to be 'offset' when compared to the dual point.
Use the screw as a reference and not the clip, and you'll be fine when swapping distributors.
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