No there is no metering block reference book.
No the reproduction 3x2 metering blocks aren't the same as the original.
Yes, it's easy enough to make your own based on original calibration specs.
Yes it matters, the 3x2 metering arrangement is not "normal" but it works fantastically.
Yes, the bowls are different for 3x2, the outboards are very very low for fuel settings. Not a big deal really, just set the floats low.
Yes, I have original specs for all of this.