I've asked about this problem before but found no resolution. Maybe I can be more clear about it. My 350 with an Edelbrock Performer has been great from the start. Recently, I began having very bad surging (not all the time) when I try accelerating from 35mph (or more) up to highway speed. Not all the time, but occasionally, and then after maybe a minute or so it just goes away. I've installed a new fuel pump, new rubber fuel hoses and vacum hoses. The thing is, I can't recreate the problem. It happens when it feels like it.
