Ultima Engine Blown Up

Ultima 127" engine gone! Why? CCI regular rocker arms swapped out for the Ultima supplied roller rocker arms, I am speculating that the valves after having the rocker arms swapped where never re-adjusted. That caused the tappet to spit all of its needle bearings out. From there you have debri locking up the oil pump, trash everywhere! Why not rebuild? Just check out the sprocket shaft! Spine is gone. Rebuild is $3500 estimated and brand new create motor with warranty comparing the apples to apples 127" Ultima is like $5500.