Bedford 220 engine tuning

Hello everyone very good for the forum, I am having a problem, I have a Bedford 220 I think it is year 63, I do not have it well ready since it costs a lot to start and when it does a lot of smoke, I already changed your hoops, metals, and take the injectors to a specialized in the subject to regulate it, it is assumed that everything is good but I still have that problem, I hope you can help me.
thank you