John, you're doing a better job rebuilding your truck than I could even hope to equal if I ever tried.
It's an 80 year old truck that wasn't exactly hermetically sealed when it was new. A few drops here and there from various orifices is not worth obsessing over.
All I drive and all I've ever driven are antique cars. I've never owned a modern car. They all leak. There are always drips and drops here or there from all sorts of different places. Sometimes they go away on their own. Sometimes they don't. I've just learned over the years that it's more fun driving them than it trying to make them 110% perfect.
I keep cardboard on the garage floor under all of them and add fluids when needed.