I was having the same problem with my 750 holley. Check to see if you have a steady stream of fuel going in every time you give it gas. I adjusted my floaters a little higher and it went away. What I did is went and found a road nobody uses. I then stopmed it to see how to adjust the floats. And went up quater turns on the front and back. Then stopmed it again then adjusted and did this till I got it to work the way I wanted to. For some reason when I adjust the float levels to be under the sight hole it runs crappy. See my post on engine and drivetrain section.
1979 - 305ci
Holley 750cfm Vacuum Sec.
Edelbrock Performer Intake
Summit 48,000 volt Coil
[This message has been edited by 4U 2 NV (edited 07-30-2002).]