A 1974 Dodge Charger's 318 cubic inch engine does *not* have a volume measured in liters *directly*. Cubic inches is a measure of volume, and liters are a different unit of volume.
To convert cubic inches to liters, you need to use a conversion factor. There are approximately 0.016387 liters in one cubic inch.
Therefore, a 318 cubic inch engine is approximately:
318 cubic inches * 0.016387 liters/cubic inch ≈ 5.21 liters