Shade Tree Mechanic
I have the MSD-8598 Distributor which I purchased from Summit over a year ago, but haven't purchased my carb yet. This has a mechanical advance and the main reason I purchased it was that it has a steel gear and I have the B-303 racing cam which requires a steel gear. I could have purchased a dist with a vacuum advance and purchased the steel gear separately however I thought this would be better. Now I'm wondering about the issues of a mechanical Vs vacuum advance. From what I now know vacuum is much more "streetable" and gets better fuel economy as well as better throttle response. Mechanical is better for a pure race setup or where the RPMs don't vary as much like a generator or airplane. Also what do I do with the vacuum advance ports on the Edelbrock carburetor? Any help here will be greatly appreciated.