You're forgetting the ultimate intorturation on motor swaps....
the Bugatti motor in a VW Golf
The VW/Audi/Porsche connection is best exemplified by the 924, which (btw isn't it too old to use in ST?) has a motor sourced from an Audi, and the 912/914 which uses the 1.7/2.0 type 4 motor which is also used in the later type 2 buses.
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