I clocked the drive gear what I believe is 1 tooth, the slot of dist. drive was pointing straight ahead, front to back. drive was originally pointed at the #1 cylinder. The results was vacuum adv. is off manifold but is limited to 16* advance cause any further is stopped by the oil pressure sending unit contacting the vacuum advance. 16* initial maybe what I'll need but won't know till I can have the car ready for a road test. Didn't expect to that far clockwise unless maybe I went 2 teeth in error?