Just a thought, it would be nice to have an aftermarket heater unit that would make for a clean install into a Bug. This unit would be similar to a modern day heater unit as found in watercooled cars but would house an oil cooler instead. The powerful electric fan in this unit would blow into the passenger compartment using the original ducting when heat is wanted. When heat is not wanted, yet fan operation is required, the fan would spin reversed, sucking air out of the passenger compartment and exhausting into the atmosphere. It would mount where the later model factory electric fan unit would normally be so as to have access to the grille in the hood and close to the connection to the windshield and down into the quarter panels for floor heat and maybe the oil lines could run trough the heater channels. Like I said, just a thought
Brian