EDIT: I cleaned up and removed that fitting. It is a fitting for oil pressure. Thanks anyway! Hey guys. I just picked up a ‘64 Ford F100 4x4, with what I believe is the stock Y block. I’m trying to get it fired up. After cranking it, I noticed it was pumping oil out of this passage on the driver side of the block. the one underneath that petcock in the block. What is that passage for? Where should it be going? This is my first time messing with a Y block. I tried looking up oiling diagrams, but didn’t see that passage. Is that where the oil gauge reads? Any help would be appreciated.