How the heck did you get 4 qts. of fluid in a torque converter? I've never been able to get even 2 qts. in one and that was a 12" converter. If you filled it up to running over it could have easily spilled in the bellhousing when you installed it.
There's a few other things that can leak other than the front pump seal and considering the bellhousing is pretty much round most of the time it'll run down and drip out from the center. Other possible bellhousing area leaks are the front servo pin plug (should be sealed with pipe sealer), the torque converter (just because it's reman'd doesn't mean it can't leak), the outer O-ring on the front pump and one of the most common causes that people tend to think is a leak coming from the front pump is a leaking dipstick tube. If it leaks it naturally runs down the bellhousing and drips off the bottom center. With clean fluid it's hard to tell sometimes right where it's coming from. Seals do not generally go bad for years until they dry out. Did you lube up the front pump seal and/or the torque converter snout upon installation? If not it'll fry the front pump and can start leaking right away.