That had to be "FIFI", and it's not just "an" B-29, it is ---last I heard--- the ONLY B-29 that is in flying condition
Sounds like you didn't get out to see her
B-29 "Doc" is being restored to alleged flyable status, but I don't know how close they may be:
http://www.b-29doc.com/images/Volunteers/MaxParkhurst/MaxParkhurst.shtml