MSD Retard box

The retard feature can only retard, it wont advance (that would be impossible to trigger the coil before the reluctor/points hit) so you install it and then you'll have to set it to 0 and then retime your distributor to read 0. It will be like 10 out, that way the box at 0 will have no change on your static timing and the higher numbers will retard their values. So your answer is no, that's a stand alone passive retard box. The MSD will use it at a certain NO2 trigger window or use it outright depending on what MSD is used.