I set my points on a distributor machine and when I bolted it on it chached the dwell 12 degreesm dont know why this happened but I had 3 more dist, and they all did the same thing, so after using the machine I used a dwell meter and set the point while on the car, belive me its not an easy job and took me 3 day to do it but it starts right up first time every time, I found my Tach/Dwell meter for 15 bucks at the local outdoor swap meet, got a Snap On and one of the wires were broke and they fixed it for free.