Tractor Repair: Temp Gauge, 8n ford tractor, temperature gauge

Question
How can I install a temperature gauge on a 1951 8n Ford tractor?
I cannot locate any port on the motor block to install the pick up
sensor into the water jacket.
Any advice would useful.

Thanks,

Don  

Answer
Sorry it took a while to respond to this question.It was a little out of my area of knowledge.I have never seen it done before, so i had to talk to a friend of mine. But good news I have a answer for you. Check this http://www.ntractorclub.com/howtos/watertempsender.htm  This link should help you out plus an awesome site I didn't even know about. Win/Win question thanks