Oil Leek c6

Hi ther it`s like this I have a newly reubuilt 468 cui roller engine al svo cj heads putting out about 600hp drive for about 300 miles with the org converter and have a small leak at the input shaft seal( new seal ) then I pull the tranny out to put in a new TCI converter 3200 stall on foot brake and change the seal again was wery careful when I puy it together not to hurt the new seal then I have put about 10 passes and now it leaks even more the drive shaft felt very tight and it`s shifts very good is there any differrent I.D on the seals the tranny is a #RFD0AP 7006 from my cobra Torino Any ideas are very appreciate greatful for any answer. Thanks Melvin