65 Valiant Signet convertible project; where to start?

Welcome to the world of early A-bodies & Valiant convertibles.
Sounds like a great car & a good project.
I like something that I can drive at least a little bit, so I would think getting it running to be first thing to address. Might as well start with a mopar electronic ingnition. If it's sat a long time old gas can become like varnish in lines, carb & tank so that may or it may not be another issue to get it running. Then there's the cooling system to check out including the water pump. Don't forget the brakes, the hoses are probably fifty years old and in poor shape. If you live in an area without heavy traffic you might be able to get by with drum brakes for a bit but I think that disc brakes are really needed on today's roads.
After it's running then I work work on the top and carpet.