Thanks for the quick reply Jeff. No, it did not have the rear speaker option or the reverb ( I wish it did). I have added the reproduction AMFM stereo and am adding the rear speaker, but I want it to appear as stock as possible when looking at it through the window. I am not very happy with the reproduction radio and may just fix the original AM radio and put it back in. (but my wife wouldn't be very happy about that). I would like to gather as much information as I can about how the option was done at the time and make it as close to that as I can. If I cannot make it look like it needs to, I think I may just put the AM back in. One of my biggest pet peaves is to see a set of Kenwoods hacked into the rear deck.
So far I have gathered that, with the center speaker option, it was a single speaker in the center of the tray, (rough side up on the masonite), package tray painted seat color and the grill was most likely painted the same color as well, correct?