On a Bosch distributor 0 231 142 005 that has the vacuum advance unit with an advance and a retard connection , if a weber carb conversion has been done is only the advance connection used ? From what I can find the retard connection comes from an emission control part that isn't used after the webers are installed?

Can the distributor be used without the Transistor switching gear under the battery tray? If so what changes need to be made?

Thanks,
Dan