I broke down a few weeks ago and ordered a new Performance Distributors' DUI distributor for my little red wagon. I haven't done enough driving to nail down the distributor's effect on fuel economy, but I can tell that the engine seems to be running a lot smoother, particularly at idle. One curious thing is that Performance Distributors' recommends attaching the DUI's vacuum cannister to manifold vacuum (as opposed to a vacuum port on the carb) I suspect that the smoother idle may be attributed to that. The throttle response also seems better.