I thought that the B1 was desiged as a low-observable aircraft; maybe not
stealth, but I do remember reading that it has a smaller signature than the
F-14.

It wasnt really designed that way probably, but with the B-1B version, there
were modifications to lower the RCS, getting rid of the variable engine inlets
being among them I believe.

Its not a stealth aircraft per se, but definitely a lower RCS than many other
aircraft

Ron
Tanker 65, C-54E (DC-4)
Silver City Tanker Base