wow, you have a nicely optioned car there. I have a question, my car is a R11 radio, but it also has a rear fader knob on the lower left dash panel by the heater controls. I see you have a code for "single rear speaker".. is there a code for rear speaker on a AM? Just curious if it would be on my fender tag. I plan on driving this car, but I love following what is correct on the tag, but would like the FM guts in the AM down the road, or even a 8 track would be cool, so I am wondering if this was a rear speaker car because of the knob, or if it was added later.. I wonder if I can tell by the wire loom.. haven't checked under there really. Hope a build sheet is somewhere in this thing..