Hi folks I just noticed that my current 404 doesn't have a hole on the side of the block(tiny needle size hole) on the block itself just close to the inlet manifold, I've asked around what it's for and I was told it's for fuel overflow, I've had fuel percolation on my car, done a carb rebuild, needle and float are all good but it still percolates and there's always fuel stains on the block just below the inlet manifold but moreso on the side of the inlet manifold. I just wonder if the absence of this hole could contribute to percolation?