Im having a problem finding a name for a part that screws into the top of
the Thermostat Housing Unit it has a hose that connect just below the carb I was fiinally able to find the Thermostat housing unit at a local auto supply does anyone know the part Im talking about ? Also the Mustang is a 1968 V6 on the air filter cap it says 200 but the auto store are saying its a 303 any help on this issue ? Thanks for any info on my problems.........

 

David, recommend you check out the classic's section since there are lots of folks there to help you out.