Here you can see how much room I didn't have between the crank pulley and the steering rack:
The back of the crankshaft pulley. It looks like maybe a smallish leak, but not for the amount of oil I was losing:
The real culprit turned out to be the bottom of the timing chain cover gasket. It was just oil-soaked. I'll replace the front crank seal gasket, while I'm in here. You'll also notice the supercharger tensioner bracket is prominent in this photo. This is absolutely the weakest link on the whole car. If you look closely, you'll notice the allen-head bolts are loose (again). Tighten them too much, and they break off. Tighten them too little, and they loosen up.
The bottom bolt should be an allen-head bolt, but I made my own contraption down there once, when Moss couldn't get me a replacement bolt fast enough over a weekend. It is the only one of the two that held tight:
Everything off, and ready to have the gasket scraped off tomorrow. If you look at the top bolt hole where the cover bolts onto the block, you'll see one of those Moss 4mm bolts broken off flush with the block. I used Loctite on them once, and ended up having it break off flush with the block, so no more Loctite on these:
Finally, a connecting rod, from my spare MGB short block: