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- Bandhead4life
If they are indeed based on Chrysler engines (the petrol-versions), it could simply be a marketing gimmick to give them some cred.
If they did alter them theirselves (and maybe they did), then it would possibly be perceived as just altered Chrysler-engines (which they essentially still are), add an extra layer of 'Ferrari-magic' and the Chrysler 'stain' slightly wears off perhaps in people's perception.
The blocks are bare pentastars with no drillings or cylinder bores.