First, my car idles at abut 1100 RPM. Should i set the timing at this RPM or let the idle down to 600 when I set the timing. All of my specs are in the sig but tell me if you need more. Thanks.

 

You should always set base timing at the lowest,STABLE idle rpm that your car will run at.If it will hold an idle at 600 rpm set it there,if it will only idle at 1100 rpm,set it there.Don't forget to make sure the car is fully warmed up and if you have any accesories that are usually on when you are driving to have them on when you set it to replicate usual conditions for the car,such as electric fans,fuel pumps,etc.

 

I have an 82 z28. How much is the idle supposed to be advanced? Car shakes during acceleration. I'm starting to think its the pulgs. Please help. I have the timing advanced to 10.
It's a carborated 305