If you are looking for the very best F-fitting on the market check this one out. You can see in the photo that this is a heavy duty fitting. You can check out the alernate metal F-fitting on the page painted a silver color for $19.00. There are a pair of 5/16" posts threaded into the intake between the center and rear carbs. Hoses attach to this fitting. The fitting points to the passenger side. Another 3/8" hose runs to the PCV valve in the valley pan. The orginal "F" fittings were plastic. Heat and age have taken their toll and most orginals are long gone. We do now offer the Nylon in the shopping cart for $16.00 Also have a kit on the page to replace the rubber hose going to the F-fitting and PCV valve.