“gas over electric hybrid into a VW “
I have no idea what a ‘gas over electric hybrid’ is so have no idea how they made one into a VW.
Gas engine>Generator>Electric motor>Drive train= Gas over Electric hybrid.
Oh yes you do...
The guy in the 70’s had a 12 HP Tecumseh running a DC 10 starter motor working as a generator to run another equal DC 10 starter motor as the output to the drivetrain on a Bug. He was getting 100 miles to the gallon at normal bug performance capabilities. With permanent magnets this would have been a very good set up. From what I understand they “disappeared” him at the time to keep this ability squashed.