Vent lines with Weber carb conversion
 

I've got a REPU with a S5 engine that I'm installing a DCOE Weber onto, and am starting to clean up all the stuff the aftermarket carb doesn't use. I've already plugged the fuel return line, but there's one last fuel hose coming up the middle of the firewall which I'm pretty sure is the fuel tank vent line. What are yall doing with this line when converting to aftermarket carbs? Does it just stay open to vent? Put a little filter on it? Route it to the carb filter plate?

There are also two lines coming off the oil filler neck that I know need to go somewhere. Can all three of these be T'ed together and run into the carb filter plate or oil catch can or something? I assume T'ing a fuel vapor line with crank ventilation lines would not be ideal, bit I don't know.

​​​Hit me with some wisdom, please.