“…. Ether sprayed into the small vacuum hose nipple consistently gets it to run smoothly for a few seconds till the ether is gone….”

At this point I’d say it’s safe to say you’ve got good spark, meaning the CPS and its associated wiring have to be OK.

But you aren’t getting fuel…..

If the pumps are working properly, and if the pressure regulator is working properly, then there should be some amount of fuel flowing FROM the regulator, through the return fuel line, back to the tank. Without a pressure gauge on hand you’ll have to assume, at least for now, that the regulator is good. So if you can disconnect the return line and cycle the pumps a couple times there should be fuel flowing out of the regulator return port. Or a good ear listening down the fuel filler neck might be able to hear the returning fuel splashing into the tank.

Can you hear each of the two pumps buzzing for a second or two when you turn the key on? You may have to disconnect the power wire from each pump, one pump at a time, in order to really tell if one or both pumps are working or NOT working. If you find a non working pump check for 12v at the pump connector. It would be good to know if you have power to each pump both at initial ignition-on and while cranking the starter.

If you find a non-working pump with no electrical power showing at its connector try running a long jumper wire from the battery directly to the pimp. If that makes the pump run and the engine run then you know you have an upstream electrical issue.

Try this stuff and report back.