pics please of your holley 1920 set up and linkage

OK on the 'blades'; it is an interesting little christmas tree of small discharge tubes.

Here is a better way to be sure the float level is right, and it the factory 'wet level':
- Remove the economizer valve with the car warmed up but off and ready to start
- Start car and watch the fuel level in the bowl; be careful in this case, with suspect float/needle valve, etc., and be ready to shut it off ASAP as it could overflow if the needle valve is not closing
- If not flooding, then use a small metal scale to measure from the surface of the fuel in the bowl to the flat surface on top of the carb to which the economizer valve screws down; this difference shoud be 11/16" running.

Don't bother with the choke right now 'til you get the ignition sorted. You can always pump the throttle a few times, and if it starts, then keep pumping the accel a bit to keep it runing as it warms up; it is summer so this should work OK. At this point, I would keep the choke opened (disconnect the choke well rod; the choke well is the lump on the intake) and start the car this way; the choke will be out of the picture as a flooding source for now.

The choke should close when the engine is cold, even at this time of year with one push to the floor of the throttle when cold. When you get things sorted out, then you can take off the choke well and look and there will be a small nut to a circular palte with a series of markings with L and R (Lean and Rich) at opposite ends of the markings; you can loosen the nut and adjust this towards L for summer operation and the choke will not hold on so long, and then reverse in late fall to make the choke stay on longer.

Also, consider pulling the valve cover off and seeing if any of the valves are sticking open if the gas has been old. You can best check the timing with the car not running while the cover is off.

Edit to add: BTW, did you check the new diaphragm to make sure the new one had the exact same holes in it as the old one? There are at least 2 types; that is another concern and the reason to ask about the list number......