what sensor goes in the drivers side head between the 1&3 cylinders?im thinkin its the water temp,is this right?i have been trying to get the sensor for bout a week and a half,and none of the sensors i get fit the hole,anyone know what size the hole is,and varify weather its water temp or what?also,whats the easiest way to tell if you have oil pressure?cuz our oil gauges only go up to 60 psi,when we start the car,it goes to 60,and then cant tell weather it is or not,thanks for your time.

 

That's the sensor for the water temp GUAGE. I believe the hole size is 9/16.

 

it's for the temp gauge, i believe it's 3/8NPT if not the it's 1/2 NPT

 

I clearly remember on my trickflow heads I had to step down from a 1/2 hole to something smaller. The 1/2 was what was machined in the head, but the sensor was a lot smaller so I had to get an adapter bushing. Guess it must be 3/8 although that seems too small.