6x9 speakers not fitting.
I have not tried fitting my infinity 6x9s in my 67 cuda yet, but i was going to mount them up from the bottom inside the trunk using studs and nuts hanging down from the package tray. I will be running a repop package tray with slots cut in it, so it all appears stock.
I dunno if thats a route you want to take, mounting the speakers up from the underside of the package tray.
Matt