First, welcome, you will find that this site has members from all over the world.
I have some questions, Does the fuel filter look clean or is there dirt inside? If I understand your post, you are still running a points type distributor, is this correct? Are you still running the coil resistor, or have you removed it? (the white ceramic block) When you reassembled the carb, did you put the jets back into the same place they came out of? I ask this one because they will fit into the same holes, but the holes in the middle are different sizes, easy mistake to make. What do you have the timing set at? should be set at 20 deg. The points should be set at 49 to 55 deg. dwell, or 0.028 to 0.031 in. gap. (about 0.75 mm) The spark plugs should be set at 0.032 to 0.035 in. (0.75 to 0.78 mm)
For what it's worth it sounds like you are running an electronic ignition coil with points, doesn't work too well because the coil overheats and goes flakey. If this is the case, go back to the original style coil with the ballist resistor, and it should help your problem go away. Points systems are designed to run on 9 volts, which is why they have the resistor. Hope that this helps.