AFAIH - automatic carbs with
'dashpot' slows the throttle return to idle to prevent automatics' T.C. engine loading from stalling when throttle closes quickly. Most auto' carbs use a simple spring/vac dashpot on the linkage.
After reading your carburetor and the car story my $.02 is simply look for a carb that is 'new old stock' or reliably freshened that matches the intake port and studs. You don't need the SCV or specifically the 1100 type carb. Any era Ford carb
can work that fits - old carbs usually have worn parts, swapped parts, leaky shafts causing continued problems. Adapters bought or fabd' work and linkage isn't complicated.
Still wonderin':
,,, why SCV carbs which controlled only early
distribs' are not considered usable since the SCV would be unused anyway ?.
... why better or later alternate carbs aren't generally used other than for true car 'originality' ?. Performance differences usually are less critical than
drivability.
"Carburetor is said to be French for don't F%$K with it... "
have fun

.
1904/2300/1100 tri-why?
The
'open to atmosphere' carb vent from fuel bowl was one of first noxious emission remediation's done at end of carburetor era. Earlier designs simple had a raised open hole in top of carb bowl. Fuel sloshing around while braking and cornering could
slosh out and fuel vapor emission when shut down warm is part of typcal 'old car smell'.
Some old fuel bowl designs incorporated a 'stone filter' in bowl vent to slow down liquid leakage (Holley 1904). Later mods were like 1100's
sometimes open vent (manifold vacuum?). Last of the carbs had sophisticated vacuum, temp. and elec. controlled vents either recirculating vapors to intake or diverting after shutdown to a remote charcoal canister - also used for fuel tank vapors.