I think HWH-ADI Exp has high chances of lhbfication maybe after HWH- Mumbai mail via ngp. Because of delay in Arrival of link rake at Howrah station this train frequently gets a delayed start at night because of PM done at SRC which takes minimum 6 hrs time. Convertion to lhb i think will reduced maintenance time also and will be more safety to passengers.
Last Wednesday i observed many around 15 to 20 coaches of ICF, CBC, Duronto H-LHB OLD coaches mostly of 2009, 2010, 2011 year of SER at Kharagpur yard . Most probably going to KGP WORKSHOP