Could be an align hone issue. Also, the bearings may not have EVER had the correct clearances.
Oil pressure loss elsewhere, seeping gallery plug etc. ...and the list goes on.
Sorry about your problems FWB, chit happens to good people...
Commentary: WTF would anyone want to run a solid roller on the street?? (You listening Kev??) With the many outcomes like this always you're flirting with disasaster.