Car starts but stops after ten seconds sounds like an old diesel engine starting sounds like pre ignition

Hi, I have the car listed above with a carburetor and mechanical fuel pump. I've had lots of problems getting it going in the morning it would start for about 10 seconds and then stop; after doing this for about 10 minutes the engine would start and run okay for the rest of the day until it went cold again. Also, there was a big cloud of black smoke when it eventually did start. So, I change the plugs the leads and the coil pack and it's still the same; it starts for about 10 seconds and stops misfires back through the carburetor. It's almost as if you've got a plug lead on the wrong plugs, but I followed the old coil pack, so I think that right even though I'm the new coil pack there's no numbers on it. We did manage to get it going by towing it, but it really is only running on three cylinders occasionally three cylinders. I'm thinking that it could be that flywheel sensor or camshaft sensor. We changed the timing belt hand water pump that's all that's all good. I checked the timing that's all perfect, there is plenty of fuel going in there because you can see it with the carburetor you can hear the fuel going in there. Checked the spark, and there is a spark, but to me it's got to be some sort of ignition failure problem intermittent, because this not fuel injected and it's an old engine the new coil pack that I fitted, doesn't have any numbers on it IA 1342. So, I followed the old original coil pack, but when we tried to turn the engine over with the battery; it's like it's firing before it should be. Wondering if there's a different firing order for these coil packs and how do I go about finding out that? There is no information on this coil pack, the only thing that I can think of is there's a lead on the wrong position that the flywheel sensor has given up. I've looked for a camshaft sensor, but I don't seem to be able to find it to me it seems like it should be a relatively simple problem because this car doesn't have the complicated computers and CPUs that the modern cars have. Also, when it did drive it would stop for no reason and then wait a few minutes and it would start up again any info on this would be greatly appreciated. Thanks.