Time to get started.

Was I imagining things or did I see a picture of a dual circuit master cylinder too? That in and of itself would make a big improvement to brake reliability, and probably feel as well.

Yes you did :D I have it in my shop with new brake lines to be put on in the VERY near future with the help from my friend just up the road that has dun hundreds of builds at Rodgers Restorations here in town and know on his own and has everything and knowledge 8) Yes I am a blessed man , I have known him 25 years and play music with him and his uncle on Thursday nights :D
Here is his old trusty parts grabber 8) Picking me up to enjoy breakfast, and his shop just 2 miles away, but 3/4 miles by the way the crow flies :D