Changing out Burley Duet Tandem pilot's road handlebars to upright bars and shifter.

I would like to install upright handlebars for the pilot. I realize I need to change the shifters and brake levers. Bike is original and is a 9 speed with a triple chain ring. Middle chain ring is stamped A-52-42-30. Large ring is stamped 53-42. Small is stamped SG-A30. Front derailleur is Shimano...