Leaks can come from various places and leak out the hole in the bell housing. Check to see
exactly where the leak is coming from.
http://antiqueenginerebuilding.com/REARMAINLEAK.html
Mine had a bad leak and I was embarrassed to park anywhere someone would see how bad it was
. Mine ended up being a problem with the previous install of the rear main as well as too much clearance in the bearing. I adjusted all the mains and rods, installed the real metal seal correctly and no more leaks