Put a trans funnel down into the converter and fill the funnel with fluid. It will run in slowly out the bottom of the funnel and just keep adding it until it fills up. Put the converter into the trans and have a pan ready to catch the extra fluid. After the trans is installed put four down into the tube. Start in NEUTRAL. The only way you can hurt a trans by overfilling it is if you try to drive it; so don't even worry about that. One time I finished up a 727 and added four quarts down the tube, forgot and stared it in PARK, added four more and had it running out the vent. Quick shoved it into neutral and kept filling it. Drove it immediately and no problems. So don't worry about overfilling it if you're not going to move the lever out of Neutral until tomorrow. You can remove the neutral safety switch to get the fluid level down close to the proper level.
