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Plymouth made 'CUDAs from '69 to '74. As far as E-bodies are concerned the '70 to '74 cars VIN numbers start BS23 for Hartops and BS27 for (convertibles '70 and '71 only)
Barracudas have VINs that start BH23 or BH27 and GrandCoupes start BP23 or BP27.
An easy way to spot a '74 is the seatbelts. Modern seatbelts that have two retractors on the floor so the shoulder and lap belts retract.
If it has a single shoulder belt bolted to the roof it's a '73 or below
All 'CUDAs 1972 to 1974 were available with 318s
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