Just be carefull, the bolt on timing pointer for a 327, 350, or 305 will all bolt on----I already danced this dance----Damn near went nuts trying to figure out why the timing mark on my 305 balancer was so far out of whack, when the car ran good. It turned out that a parts guy had sold me a bolt on timing pointer for a 350. It bolted right on, and pointed to the totally wrong spot.