One good thing about these 123 ignitions is that, while you can delete the points by adding a Pertronix, Crane or other electronic set-up, you are still depending on the accuracy of the basic distributor unit itself which, after 40 or so years, may have issues of its own (play in the bushings, flyweights / springs etc). The 123 module replaces the entire distributor. As for cost, a new Bosch distributor is about $850 (current price at SLS), so you have to figure that into the equation as well.