The tank was flushed when I restored the car and the filter is clean on the carb and the main filter is new. (600 miles on it) I also cut the filter open when I changed it a couple of weeks ago just to see if there was anything in it. It was sparkling clean. I have NEVER had even a HINT of any kind of fuel hesitation or fuel starvation on normal driving. It is only above 70 degrees doing a simulated quarter mile run on the way home from work. I have tried just about everything.