Saturday was the first time I set my timming on my 76 350 4 bl. The book said 8 degrees B. I marked the 8 on the pointer and the long line on the the what ever it's called, the round thing. I can't remember. When I shot the light on it I couldn't even see the mark on the wheel. It was about 5 inches to the left. I noticed the previous owner had marked a "V" close to where the timming should have lined up. Would there be a reason for this. Did he change the spot the timming had to be marked somehow? I know it's the stock motor, but the timming chain has been changed before. I set it using the proper mark. I didn't notice any difference. It seems if it was that far off I would have noticed a difference. Any ideas? Should I leave it using the stock marks? or his? On the other hand the mark might be from when he put his timming chain back in.