Reference Details
- Common issue
- A 340 badge, H-code VIN, or later 340 engine installation can align with model identity while still failing an original-engine stamping and paperwork inspection.
- Confidence
- documented
- Correct value
- For 1972-73 Chrysler 318/340/360 V8 engines, the first three numerals of the engine serial number indicate cubic-inch displacement; the 318/340/360 V8 engine serial number is located on the left front of the block below the cylinder head.
- Where to check
- Engine serial-number stamping on left front of engine block below cylinder head; compare the displacement prefix to the car's documented H-code 340 identity, but do not treat location or prefix alone as individual-car proof.