Hey guys. So I've got a '56 F100 with a 1970 model 351W/C-4. I just put on an Edelbrock 1405 (4bbl, 600cfm, manual choke) carb straight out of the box.
In the morning, on full choke, it fires up pretty easily. Usually stalls a time or two, but will stay running if i feather the throttle. Even on full choke, it doesn't like to idle on its own. I have to keep it around 1200 rpm or it will stall.
When I put it in gear, it wants to stall. Drive or Reverse, doesn't matter. Once I make it out of the garage, and under throttle, it's fine. (It takes some low-speed maneuvering to get into/out of the garage, which makes this situation even more frustrating!)
When I return home in the afternoon, the engine is warm. It will sit and idle at a stop light just fine. But as I slow down to pull into my garage, it will try to stall. I have to really feather the throttle to keep it from stalling.
I've made no adjustments to the carb yet. If anyone has any recommendations, I'd appreciate it.
FYI:
-I'm in N. California, current daytime temps are low 60s, overnight low 40s.
-I live at 900' elevation, drive to work at 2000' elevation.
-Warm idle in gear is about 7-800 rpm. Stable idle, doesn't seem to be a vacuum leak.
-Electric fuel pump is new. Pressure regulator set to 6-7psi. Fuel filter is new.
-New distributor/plugs/wires, no miss detected

 

Can you feather the choke? It usually has a high idle cam that engages when it's applied. You might try adjusting that to up the idle.

 

If I engage the choke fully, it does speed up. I let it idle until it warms up a bit before attempting to drive, but even so, it still tries to stall out until it's fully warmed up

 

I have a 302 that uses a Holley with a manual choke. I have it set to a minimum of 1/4" gap when the choke is fully closed. So it likes full choke for a cold start (of course, here in SoCal, "cold" is nothing like "cold" was in Detroit winters). When first started cold, it idles at around 1000 rpm, and slowly creeps up to about 1500 in the first minute or so. I have to slightly open the choke, and therefore reduce the idle back down to 1000 to resume the warm-up before taking off. I have a manual, so it's not as bad as trying to keep the engine running while in gear with an automatic.

If you have not yet adjusted the carb, I would at least set the idle mixture, with a vacuum gauge, and set the hot idle speed with it.

Then check the base timing, adjust if necessary, then repeat the idle adjustments, until they all settle to where they should be.