Exhaust Manifold Casting #'s - CORRECTED 340 #'s

top of the list is the common LA manifold listed in chart as #2475719. I possess (3) with #2465719 on them. Typo?? Also the break from LA series to B/RB is incorrect last several manifolds in LA chart belong in B/RB chart. Saw this list also seemed identical on www.mymopar.com site as well as a restoration supplier, so evidently it has been out there for quite a while.