Stop and start

I would have unloaded that car a long time ago rather than put up with the frustration, and the danger, of driving a car that stalls. As for the problem, you have clearly replaced most things that could contribute to the problem. My guess is that it is a fuel-supply problem or a fuel- mixture problem. I would have the fuel pump checked, check also for fuel blockages in filters, including the filter on the fuel pickup in the tank, and check the carburettor to make sure it is adjusted correctly, particularly the float level. Finally, check for air or vacuum leaks that might make the engine run lean.