I had a ‘78 with the trench and the PO tried to make it more like a Music Man. It was not good. IMHO trying to cover or fill in that trench is a lost cause.
But there are more suitable bodies out there if one wants to explore that concept.
But there are more suitable bodies out there if one wants to explore that concept.

Both basses are from the same builder, same time period, and same model....just different paint, bridges,and fretboard woods.