i have a 327 small block. i have 3 options to check the temperature, first there is a position next to cylinder no 8.. then on the intake manifold next to the water pipe feeding to the radiator... then on the radiator itself i had s fitting mounted on the to reservoir.... each of these positions give me a different reading so which is the correct place..... next what is the ideal temp for a normally aspirated motor to run ....motor #V0810CKM