I just finished installing my toddco igintion. What a huge difference it made. Idles smooth all around performance was a lot better. It was dropping out and almost stalling when put into gear even with a new IAC and not now it is smooth as can be. And that is with a bad vacuum advance. The customer service was great too. UPS screwed up and he sent another one out with out issue even offered to meet me on superbowl sunday to personally deliver it.