The first time I've been afraid to rebuild a carburetor

Well....the original, unrebuilt Holley 1920 on my '73 Plymouth is beginning to seep out of the accelerator pump vent. Not bad yet, but of course, I don't want it to *get* bad.

So, it has to be opened up. The only bad part is that it currently works perfectly, or as perfectly as a 1920 works. I feel like I'm going to tempt fate by breaking that thing open...sort of like a Pandora's box.

That's the first 1920 I've ever seen that's been on an engine long enough to have a half-inch of grime covering it. Still has the single-use clamp on the bowl vent tube.