water sending unit

Johnny71dusty said

I keep getting new 1/8 npt Tempe sender for my 198 . But my new head is much bigger . Bigger than the 3/8 people been talking about . It's as big as my finger . Anyone know of a another size they used ?

Click to expand...

Can you post a picture of the top, front section of your head? I looked at over 10 different heads, from 1964 to 1984, and they all take a temp sensor of 1/8 NPT. Some heads only have one 1/8 npt hole, other heads have the 1/8 NPT, plus one or two 3/8 NPT holes.