I was admiring your speaker installation, and as I'm doing some work in my trunk ('72 Lemans), I've pulled the conv top well liner up and ... there are some speakers, but they don't look original. The speaker holes for 6x9s are factory holes there.
While looking around the web, I came across
this thread from the Chevelle (yuk) site, and it is discussed that the speakers were mounted "inside" the liner so they can be heard with the top up ... REALLY? With the boot stuffed down there they must be muffled, but the functionality would definitely be better inside the liner.
Just an interesting thought for discussion.
Ogre