sticking needle/seat on Holleys

I am curious-Holley's needle/seat combos can be finicky at the worst times (as in when they stick and you are in traffic and feel it start to load up ),so has anyone found a really good fuel filter or for that matter a better needle/seat set up that seems better than the standard Holley fair. I have a new tank,lines& filter but still seem to get a gremlin every once in a while.The fuel pump is nothing special and fuel pressure is 5-7 pounds. It has happened on other rides of mine in the past so it's not this car nor the gas I use.