Quote Originally Posted by roadster32 View Post
Dave i believe the only boxes that use 1/8" NPT is the Torqueflite & the Powerglide.
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.