Just looking at my 79 'G' when doing my shift seal and it seems to have adjustable pickup timing on it. I know from posts before that they 'locked' this down and some mods were needed like grooving out the plate for movement. It appears to be the local first early TCI model this may have been set up for advance /retard of TCI timing. One for the gurus maybe? Skull and 5T? This 'Local Girl' throws a few curve balls my way!