There is not suppose to be any fuel in the vacume line.
If there is than regulator is on it's way to go, but it's still not dead. If it would have a leak it would simply pump the fuel through the vacume line in to the intake & you would have a realy hard time starting & keeping it running.

a hole in the vacume line (depending on it's size) would give you erratick idle, stalling when applying break to stop etc.

and i wouldn't recomend using a fuel line for a vacume.
Vacume lines are ussualy a little smaler than the actual size they suppose to be (so they would fit snugly on the fittings). To put that vacume line (if your hands don't fit) use a long needle-nose plyers. Otherewise you will end up with the same problem you started out with, a vacume leak.

Just my $.02