I've used Pertronix in the past with no problems (I liked it) but this time I went with Crane. It ran fantastic for about 10 minutes but after stopping at a gas station for gas it wouldn't start. Luckily I saved the points in the car and was able to drive home. I received a full refund so thanks to Crane for helping me with this but I cannot give this product a 5 star rating. FYI I checked the ballast as described and followed the instructions up to 't' so I don't see how my adjustment affected the install. Now I'm going with a new HEI dealer. Today colleges have become very cheap on the secondary market - around $50 each.