Hi from New Zealand guys , I recently acquired a 52 plymouth cranbrook thats been a restoration project over the last two owners .The motor was reconditioned and mostly connected up .Im trying to put the temperature sender bulb into the block which i assume is in the head at the back on left hand side i cannot get the bulb in its too fat .so i tryed a spare one i had from previous owners parts car i can get this in until i hit the flange at the base of bulb . Is there ment to be something that screws into head first then the bulb into that ? Thanks