I have a '73 with a 350 and points ignition. I am looking to upgrade the ignition system but I have a mechanical tach on my distributor and I would like to get one of the aftermarket ignitions systems that allows you to keep your distributor. Anybody had experience with the MSD or Jacobs systems on a Vette? Anybody recommend or not recommend one? The ads for these systems say that they will adapt to a points type ignition, will I be able to keep my distributor and tach?