Yup, that's exactly the one I was thinking of! That one's on an early A, so really tight on that one.
I found a couple more, these are 67+. Not quite as extreme, but still pretty tight
'72 Scamp-not really a "restoration"
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And this one...
Hedman tight tubes
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Bottom line for me is anything you gain on the install of the shorty headers you lose in fabricating/installing the head pipes. Might be cheaper in outright cost if you're doing it yourself, but only if you don't consider what your time is worth.