- The stock Cadillac ignition is NOT good enough for a tuned engine – or even hard use with a standard engine. You have to change to a high performance points/coil ignition, solid state ignition or use a magneto. Magnetos are period and pass muster for historic racing. This is the first thing you have to do.
- One of the weak points in the Cadillac 331/365/390 series the fact that the outer ends of the fronts of the rocker shafts are not supported and tend to break under even moderately hard use. The solution is to fabricate stands for the ends of the rocker shafts, especially for the front. Better still; go to a larger diameter rocker shaft. We use 1950’s Chrysler shafts and after-market rocker arms. Even these shafts, fully supported, tend to fracture under racing conditions.