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"ESC Knock Sensor" or Detonation for specifically 1982-92 mainly 5ltr V8 (305) sensor is located on the RHS of the block above the starter motor... may also have a buggered electical connector as well (see electrical connector sub-section).
FITS SPECIFICALLY
While they don't fail often, if you suspect this problem, it's one you need to move on quickly to head off engine damage.
Purchase Option::Connector Not needed