Oil Tank vent?

I removed the big air box from my '75 MKIII, and just let the vent hose from the oil tank hang loose. I think this is the source of a fair bit of oil drizzle, and I was wondering if there's a recommended catch-can that can be installed at the end of the hose to catch this overflow?

a lot of us just put a smallish bottle in the battery area somewhere and put the end of the oil tank vent hose into it, making sure it is not sealed and can breathe, personally I let the vent hose hang down behind my Mikuni and have a small air filter stuck to the end of it

Depends on what you're using for an air filter now. With the current stock Amals, I use the K&N filter. I drilled a hole in the center of the back of the filter and used a kitchen sink rinser hose with the plastic tip into the filter. It even looks a little high tech with the webbing visible through the clear vinyl. Been like that for decades, so no ill effects with inhaling the oil fumes into both carbs. I do also run the breather check valve to ensure positive vent pressure from the timing side into the tank. You do need to be careful with the tank fill level to prevent liquid oil from traveling with the fumes. Maybe a puke can is a simpler solution, but you need to remember to check and empty it.

If you keep the stock oil separator you can run a drain from the bottom and vent the center connection the same way Deckard described. I don’t think I have ever had anything drip out of the drain but it did stop the oil getting in my air filter. Once a season I blow out the drain just to check for crud.