@TomC: The three Rose Bowl 1970 Polara 'verts of which I know are
DL27T0D137741 (used to be John's); DL27T0D137743 (used to be
Polara Dave's; it is
now owned by
@1969vert500); and DL27T0D137744 (I have known it as "Tom's car" in Dave's Yahoo list of Polara 'verts, so it must be yours
). See here for the list:
71 Dodge Polara Brougham coupe
All those three cars have the same scheduled build date (October 15, 1969). As
@polara71 noted through
@71Polara383, the actual number is not known and the sequence is not consecutive. The fact that #42 is missing from the above sequence suggests (but does not guarantee) that there were at least four RB cars, though there may have been more.
It would be great to see more photos of your car, including the fender tag and any build sheet if you have one.