i think you have an obstruction in the discharge passage that runs up to the squirter. if you look at the bottom throttle lever side of the carb below the curb idle screw you'll see what looks like a plug. this plug is used to close up the drilled pump discharge passage. remove this plug and clean the passage out. you'll have to come up with another plug to replace what you take out but this will probably save the carb. bet it's full of crap. also, you may be able to snake something up the passage from the pump well discharge port. i've used small wire ties to clean some of these passages out but that's a tight bend there. maybe a smoking pipe cleaner will get in there.

You have changed the hold down bolt and squirter to eliminate them I hope.

Once the delay spring collapses, gas shoots out like a firehose.

Installed the Edelbrock 1470 pump, and it works, shoots gas as soon as you touch it.

In the pic the new pump spring has less coils. I also have tried adding oil to the leather cup. It makes them swell and then they're too tight. Why not try the original pump? Just put together a set of AFB's Ive owned for 30 years. Soake the original pump leathers in fuel. They work perfect.
Doug

I did soak in oil first. It works with the Edelbrock pump now. I'll just preserve the leather pump for later if I need it.