I'm working on a carb issue myself. My problem is with a 4160 Holley 4 barrel. The primairy float bowl gasket started leaking. I picked up a pair of float bowl gaskets yesterday for a 4160 but they weren't quite right. I could make the gasket fit and seal up the bowl but there is an accelerator pump on the front bowl that injects a stream of fuel through the metering block and into the carb throat. The gasket was wrong for this hole, the alignment was off so when assembled the carb just drinks fuel through the accelerator port straight from the float bowl.
I should have my correct gasket today. Apperently there are different variations of the 4160 carb and I guesse wrong on my first try
