I'm about one hour and some miscellaneous parts away from being done with my rebuild. There are a few hoses we're not sure about, the main one being a brass colored 1/2" metal nipple on top of the block just in front of the bell housing. I don't remember pulling a hose off of it, maybe there was supposed to be and wasn't, or maybe nothing ever went there. I'm running a TMIC on WRX heads with an STI Block. I thought also it might not have been needed when the original owner did the STI bottom end install.
My friend thinks it is a vent for the crank case, but where and if it goes to anything is unclear. Anyone?