[jackmech]

I'm going to have to go with the assumption that you're using the stock distributor, in which case you need to hook up the vacuum advance to get that little burst of timing when you step on the gas. If you've got Weber IDFs that don't have vacuum advance ports, you can send them to aircooled.net to have them put in. Costs $75 + shipping to do two (which you should do and T them together).