All of the information above, centered on which instruments to get, is great. A couple of points about the behind the scenes part of your panel. Before doing any work you should make a schematic of what goes to where, both electrically and airlines. This may be tedious but will be important during the rebuild. Seriously consider rewiring everything behind the panel. I imagine it is a hodge-podge of wires from years to additions and subtractions. Scary? Maybe but rewiring, and making a schematic, pays dividends when you are getting everything working and later mods. Guess what I am doing this winter on my "new" ship? See http://aviation.derosaweb.net/presentations for some helpful hints. Best of luck. - John