I'm going to install a edelbrock manifold with 3 rochester carbs on my 305 but the HEI distributor I have now is to big and I'll need to go to the old style smaller distributors from the 60 and 70's for the last carb to clear. Since these old distrubutors would break down prematurely because the terminals were to close together that the spark would crossfire inside the cap I was wondering if they make a smaller model HEI that would fit my purpose.