Now that I think about it, I belive that second line usedto be connected to a small nipple on the valvecover breather when I had the 2bbl carbon and air cleaner. But I can't remember for sure. When I swapped on the 4bbl I had to change the air cleaner, which also made me put on one of those breathers that's just a filter. I stillhave that breather I believe, but can'tremember for sure if that's how it was hooked up. Whadaya think?