A temporary fuel pressure gauge T'd into the fuel line in various places will give you some info, not guesses. Try before and after pump, before and after fuel filter. Also, just for the heck of it, try removing the filler cap. Sometimes they go bad and won't let any air in as the fuel level goes down, that could definitely be it.
Points? could be condenser going bad. Electronic ignition module? Could be that going bad as well, also could be the screw that holds the module to the advance plate in the distributor.
90% of fuel problems are ignition problems.