well depending on how long you let your car sit before you pulled the trans out and then pulled the converter out of it will determine how much fluid is gonna be in the converter. theirs this thing called drain back, if it sits over night the converter will be half full. if you started it up, moved it, then pulled it, it would be full. a converter will never go under 1/2 full of fluid. if you did somehow decide to drill a hole in it to drain the fluid. your best bet would be to drill it in the side midway between the weld in the middle and the back side of the converter where it turns to go up to the pilot. not in the back or the front. the back (where it sits flush on the flywheel) has a disc that rides that wall and the other side has fins.