You may have the same prob as crunch did with his that I helped him sort out.
Not the same car, but engines all tune the same more or less. -

Sounds like a definate case of the low speed mixture being too rich, killing the motor at low revs, especially when pulling away from tickover.
Try turning the low speed mixing screw clockwise (right) no more than 1/8 turn at a time to lean it out a little. - its the screw slot that looks just like a large screw in the side of the carb, don't confuse this with the main high speed mixture setting which is a different one.

Hope this helps you