Allahabad needs LHB for two of its train 12403/4 and 14115/6.
Haridwar Allahabad Express needs LHB coz it's rake are too jerky to deal with.
I'm not talking about prefere,but of need.
12403/4 rakes are good and if LHBified,its rakes can be handed over to Haridwar Allahabad Express.