[patrickt]

Don't pull anything - just replace the needle and seat. You can do it from the top of the bowl with the carb on the engine. It's a ten minute job. Then just set your float level below the sight plug. Sometimes secondaries need to be set a little lower, especially if your carb is tilted.

The reason a lot of Holley guys with big engines have to set the secondaries a little lower is because the gas today percolates out a lot easier. Go ahead and set it to the bottom of the sight plug, then take it for a nice hard run, pull in the driveway, and take the air cleaner off. Then watch the secondaries and see if it's boiling out through the boosters. A little can be ok, a lot is not.