727 Debacle possibly converter?

How's it going guys well got a odd thing going on and looking for some advice or if someone has experienced this. So my dad and I went for a drive on about a month ago freeway,side streets, and mountain roads by a lake but at lower speeds. When coming back we came off the freeway I merged into the main road and noticed smoke coming out from underneath the car. Pulled over and the transmission is dumping fluid from the front of the bell housing at a decent rate, had to get it home and decided throw a quart from the trunk in it and finish getting home as we were only a few miles away. Got home dropped the tranny, and I had bought one rebuilt for cheap so was just going to do a quick swap since they were the same and rebuild the bad one. Well I put the torque converter on put the tranny back in the car everything all bolted together ready to run. I notice a drip starting to come from the front of the bell housing but I was figuring that maybe I spilled some out of the converter installing it? Well then I started the car and the leak is still maybe not as fast as flow of fluid but still coming out. I thought in the first one the front pump seal just went out or something but it's doing the same results on a different transmission? Nothing looked out of ordinary when I installed the converter? It's coming out and flinging out onto my headers. Guess I'll have to drop the tranny again and look but idk what else it could be?

71 dart 340 to 373 small block
Xe275hl cam
3.73 gears
727
3200 dynamic converter frank dynamic
9 1/2
I appreciate any help on this guys