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Finishing up the engine compartment of my Beetle. I thought I'd mention the generator pedestal. In thinking forward, I decided to install an alternator pedestal that will still hold the generator that I'm using but I'll be able to much more easily swap in an alternator down the road.
Here's the difference between the generator and the alterator pedestal. The generator pedestal on the right has the area highlighted that's a cutout in the alternator pedestal on the left.
Here's a side view of a vintage VW-style alternator:
The red line shows the bottom-most part of a generator, which is a pure cylinder. The green line shows the part of the generator that protrudes down into the space that is cut out on an alternator pedestal.
Here's the pedestal in the car. The part that sticks up to the right is where the oil filler assembly goes, which contains the connections to the air intake for vacuuming off the crankcase pressure and the road draft tube.
The filler assembly is held on the pedestal by a somewhat unique nut. It's hollow in the center because that's how the oil gets inot the engine when you put it in the fill opening. 
Here's the tool that's used to tighten and loosen the oil filler assembly nut. 
The oil filler assembly is outlined in green. The road draft tube is highlighted in red. 
A shot down the oil fill opening. You can clearly see the round nut that holds the oil filler in. You can see that I added two new notches to it to make the tool grab better. 
All assembled! 
Belt on, all done for the evening! 