I never noticed the sump depth on mine as the sump was rotted from being on the ground a few decades. I did notice more front cap clearance than both a 69 400 (YD)pan and my Canton pan. I grafted that section onto my Canton pan, as it was modified for belt drive when I got it used for a good price.
Any chance of you measuring the crank pilot hole? (Diameter/depth) I think mine was machined as it had a roller bearing in there. Mine is bigger ID and @same depth as my 69 400 crank. The hub OD measures 2.6 " as the early cranks should.
Thanks
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