Carburet problems

Good friends, I have a problem with my Landcriuser FJ40 1980, use a 2F engine, I have problems by adjusting the carburetor I do not achieve a balance between the air and fuel mixture, and I also do not do if the distributor is well regulated, please if they help me with how both carbure and distributor should adjust. Everything is original of factory.

It is important that you check if there is an air input, when this happens it is difficult to put the carburetor

What I would like to know is like achieving the correct mixture, or if there are a number of turns already given for the needle of the mixture and the accelerator, that carburetor only has a needle that serves for the high and low, and the needle of the mixture.

When a carburetor is regulated, it starts with 2 1/2 return and after there it works depending on the conditions of the carburetor and the motor.

But I must close the needle of the mixture and then open it 2 1/2 turns I remind you that it is a carburetor of the old.