On the Holley I'm using now on my FE, it has sprung leaks in a couple of places and the year that the metering block was made was a reportedly "bad year" for that metal that Holley used. I have pics on this forum showing how the ethanol was literally eating the metering block up and causing flaky white stuff which of course clogged up the carb just enough to make the car run like crap literally out of the blue. I read in other forums that I just happened to have the bad luck to have that metering block made during a bad window of time. The replacement metering block that I put in has not had that problem. Another metering block somehow developed a
really hard to see hair line crack, again out of the blue, that caused a hard to figure out leak even with the fluorescent dye. Then, one of the little black bowl screw gaskets that I used during a rebuild decided to cause a leak every January or February when the garage got chilly, but never during the summer. After the third straight year of having a January leak when the car was just sitting in the garage I looked at the "new" bowl screw gasket under a magnifying glass and found the flaw. It hasn't leaked since. I still go down to the garage every week in the winter and pop the hood to just see if she's decided to spring a leak out of the blue. The beauty of a Holley equipped FE is that there is
always something leaking or on the verge of leaking.
