1966 Factory V8 Valiant Signet Restoration For My Other Daughter

Why are there so many speaker holes in the package tray??

That would make it handy to add some modern stereo equipment.

I'm currently planning a system in my valiant and I'm thinking to leave the hole open where the rear defrost bezel would go to act as a bass port so the trunk has some air circle-ation and really rattle that deck lid. :p

I can't answer your question but I have two 66 Valiants, both have the three speaker holes. I put some 6x9's in two holes and left the other one alone but I did consider it would make a dandy port for a boxed in subwoofer should I decide to go that route.