Dave i've worked with C4's all my life but never seen one with 1/8" NPT threads.



Quote Originally Posted by IC2 View Post
Steve - My two C4's have 1/8NPT. I even had to buy a new tap to chase them as all my NPT's were 3/8 and up. But, like I said above, Ford made lots of interesting parts in the '60 through the '80s.