1965 coupe, SJ 15MAR65 build, 30MAR65 build date of car. 5R07C (Warning lights) Just purchased from original owner (SEP2017)-- he was 80.. I'm taking the car back to original. The PO ran a piece of NPT copper pipe out from the block to attach the sensor. The car has power steering. Q: does/can the sensor screw right into the block? Why do i need the hex extension piece?