If you read the installation instructions on the crane web site, it does require replacing the stock breaker plate with their unit. Other than that, the installation seems as simple as the Pertronix install. If I didnt' already have a Pertronix, this woud be a no brainer. My goal is to have a rev limiter and not break the bank. Pertronix sells an externel rev limiter for $129 @ Summit Racing. But, for $70 more, I could go with an MSD 6AL.