That breather hose is just sitting there, it connects to the air filter assembly. Oil pressure sender is shown at the back of the block for a 0-90PSI rallye dash, yours may just be a smaller "switch" if you have a light only. Nipple on the intake itself is for brake booster vacuum.Thanks that sure looks awesome I see the hose going to back of Intake from valve cover my block has the nipple there I thought that was for oil pressure gauge if wanted?