Ask for the replacement distributor for a "64 Ford pickup (F-100 or similar) with a 292 v8. I believe the Cardone number is 2808-01 or something like that at several suppliers. Expect to pay about $100 or near to that. It is a single point distributor with internal mechanical advance and a vacuum advance pot.

You can get an inexpensive carb adapter from Speedway in Lincoln, Nebraska to fit a later design carburetor onto the '56 4bbl manifold. The carb hole patterns don't match - and throttle bores need (smoothly) aligned - but the adapters do a fair job for a reasonable price. If you can acquire an 1957 - or later 4bbl manifold that would be a good find. The stud pattern will accommodate later carbs - but as Mike said above - the throttle bore openings are small and if you don't use a heat isolator spacer (or open them up) there will be an awful flow restriction step below the carb.
If you hunt around on here there are some clever instructions to modify the oil-bath air cleaner to accept a paper element - and still fit under the hood nicely.
Steve Metzger Tucson, Arizona