No problems - glad to be of some help.
Post some photos when the radio is installed in your car. I'd be interested in seeing them.
Well, radio is installed and working! Yep, radio IS mono only- the two speaker plugs are for positive and negative (not left and right), and that what I'd thought was the balance control is a tone control. I found some crimp-on single plugs in my toolbox which worked perfectly, so I avoided having to order an $8.00 (+/-) speaker plug from Germany.
Pretty-neat- Alfa provides a ground on the right side of the (Series 1 Giulia Super) ashtray- a threaded stud with nut on it- which I used in lieu of the negative plug on the back of the "stereo". I bought a length of Simpson bracket which I cut and drilled for the back radio support.
It was kinda fun to take a walk through memory lane by means of looking at my underdash wiring efforts of +/- 25 years ago
Also, I remembered from way back then that reinstalling the ashtray/cigar lighter was a s*navab&tch, and I was right! I used an early 80's Kenwood speaker I had laying around in the factory dash speaker location, and voila- toe-tappin' AM and FM tunes. I couldn't get anything on the SW or LW bands from my (concrete block) garage, but now a road trip is in order to see what I can receive.
Thanks to all who provided advice and moral support. Photo coming soon..