I need some advise for tuning my dist. I have a Mallory Unilite vacuum advance dist with a 600 Edelbrock carb. I've done alot of tuning and have narrowed my problem down to my distributer. My car likes to studder and bog really hard with the vac advance hooked up. If you unhook it, the studdering clears up and it sounds smooth. What do I need to do to fix this prob? The only info I have found is by purchasing a book. Any help? Thanks.