Has anyone put a black box on their mojave that they could give me some input about. I know it advances the spark curve and increases the rev limiter. I had stopped by my dealer to inquire about cams for my mojave, and a box was listed a mod along with the cams. They had one in stock that had been on the self for 108 months from when mojaves were the bomb, and they said I could have it for $150. I know the spark curve will help, but I am worried about the rpms. One of the guys said that they can take out an engine, all depends on your luck.