Easier to pull the transmission than the engine to get at it. To remove the torque converter, you pretty much must remove the tranny, so you will be working on it outside the car. It is easy to replace the front seal. I even did it when I was a dumb kid when having my engine rebuilt.
But, first insure the front seal is truly the problem. I think if you over-fill the oil it will come out the front seal (or look like it). It is easy to over-fill because it is hard to get a good level reading, especially until you get it right. Otherwise, it splashes and churns so you get strange readings on the stick. I just dealt with that on my 1996 minivan's torqueflight (very similar). I thought it was leaking from the front when I had slightly over-filled in dealing with a "no reverse" issue (turned out to be failed L-R servo piston seal again).