I am willing to go the other way, given a 3-view drawing of the component part; but Okay:
vwtype3.org / Owner's Manual: Mechanical
Barbuza - Automotive Photo Editor
Either cooling fan setup fits the [universal] case. The distance from the upright fan shroud rear face to the generator pulley face is 8" (by inspection). Replacing the stock generator seems problematic since the resolver is where the fan would want to be. OTOH an air-conditioning compressor can be fitted under the stock engine compartment lid and they are similar in size.
The Beetle engine compartment is confining, but [those in] Buses, Karmann Ghias and Bajas are not.