this is unbelievable !!
i have a 41 willys. i purchases ac and heater bulk heads from summit. billet specialties part #66825 and 66720. thought the heater bulk head was slip on hose to a n o-ring like my fuel line. here it is slip on hose to 10 a n ac fitting.i couldn't figure out how to go from ac to the water pump and manifold for heat. called billet speciaties guy says call russel we use there fittings called russels they didn't know called summit tonight on hold for 43 minutes the guy came back says they don't know call billet. i'm calling billet in the morning see if i can talk to someone different. i can't believe they sell a fitting you can't use anyone ever have a problem like this that knows what fittings to use ? thanks zano