It sounds like your carb's float is stuck. Black smoke indicates an over
rich fuel mixture. By the way, your car is either a 1964 1/2 with the 170ci
engine or a '65 with a 200ci. Check the fifth digit of your VIN. It should
be a U for a 170 in a '64 1/2 or T for a 200 in a '65. Unless, of course,
you or someone else installed a 170 in a "T" code '65.

Sure sounds like the choke is staying on too long?

I'd start with testing the choke pull off..... It may not be holding vacuum
well or it may be adjusted too "loose". Other considerations include the
choke stove... it may not be warming the chokestat quick enough (the bimetal
spring under the black bakelite cap).... possibly a reluctant heat riser
valve in the exhaust.

While the automatic choke may seem to be complicated (the favourite fix is
to throw our arms in the air and install a manual system - usually a bad
move since the carb isn't design for manual choke operation), it is a set-up
of simple systems working together..... To effectively repair an automatic
choke and bring it back to "as new" operation, it is essential to understand
the subsystems.... Your local library can probably help. While terms like
choke pulldown, choke break and pulloff may sound daunting, all of these
actions are simple and happen for easily understood reasons.

Get a grasp on Bernoullis principal, check some of the automotive or
carburettor basics type manuals and, in no time, you should be the
expert.... honest. If I can figure it out, anyone should be able to if they
have the desire.

When the engine is cold and you step on the gas to set the choke, check to
make sure that your choke plate is slightly opened. If the plate is
completely closed the engine will start right up but after a few seconds,
when it uses up the available air,  it will start to run rough. After the
choke starts to function, and it gradually starts to open the choke plate,
the problem goes away. Also if your engine is not getting enough air, at
start up, the air/fuel ratio is on the rich side thus the black smoke.

Hope this makes sense!

Sounds like the choke just warming up. That's what I would expect.

Is it black or just wet? the condensation in the pipes is gonna be forced
out and splatter on the ground. The other thing it could be is unspent fuel
from when the engine was running rich while the choke was closed.

I think you're overanalyzing this early in the game.

Two things ,,,,the choke is probably loading up. Here is a quick primer on a
choke ,,, it should be shut tightly when the car is starting ,,then it goes
to "pulldown" which is typically no more then a 1/4 inch slot of
opening(even less),,,then the choke slowly pulls open from there. If the
pulldown setting isnt open  enough the car will "load up" ,,which
essentially means its running way to rich. If the setting is too much the
car will die after starting. Pulldown specifications are published and the
way to adjust them varies with the carb. Its usually a vacuum diaphragn that
opens the plates to "pulldown". Sometimes just turning the choke cap one
notch leaner will help but the choke cap really only controls how fast the
choke comes off after pulldown although it does control the plate tension.
You have to find the adjustment to control pulldown. Have someone else start
the motor while you watch with the air cleaner off,,, you will see the carb
go to "pulldown" and you can then trace the linkage and see how to adjust
it.
The other possibility is that your valve seals are shot and you are leaking
oil past the seals into the combustion chamber at startup. You can usually
tell if your running rich ,,,, or burning oil ,,,, rich is black,,,, oil
burns with a white smoke.
Steve
ex ford engineer