I have a 90s 4.0 in my MGB, and oil is pooling up on the top of the engine (below the air intake). I've...never seen this before! It pools up after every drive.

Where could this be coming from? The valve covers are seeping a bit, but they're dry where the oil would be dripping down onto the engine from...There are some fluid stains on the carburetor, but I dunno why oil would be in there to begin with...I'll probably do the valve cover gaskets as a matter of course, but I can see this while-I'm-in-there turning into pulling the engine, and I'm not prepared for that yet...

There is a lot dripping near where the oil filter is, but I think I just have several leaks (and I'm trying to tackle them from top to bottom to some degree)!