Please, tell me it's not too late!

I usually pour about 1/2 to 3/4 of a quart into the torque converter before installing . But if it is already in , I would pour 4 to 5 quarts into trans. Start up motor, put into neautral, and after about 20 - 30 seconds pour another quart or 2 in. Then start checking it and fill it up. Don't forget that you have to check the fluid in neautral. I don't think it will hurt anything, but I have always put atleast 1/2 a quart into converter before installling.