I generally dont put any fluid in converters but if you can get a quart in before you put it on the trans it is best. It will take quite a while to do this so dont plan to do it right before installing the trans, and some is going to leak right back out when you tip up the converter to put it on the trans. Just make sure when you start the car up you already have 6-7 quarts in the trans and immediately poor in the rest, it will hold roughly 13 quarts give or take a bit.