you're getting closer in understanding the fluid drive part of it. If everything is perfect, the converter should go 1 to 1 when stator speeds and drive vanes start to match rpm. This is only in theory. Most converters never really do go 1 to 1 during the run. Powerglide is the closest in doing so. You still need to also commit to foot braking it or transbrake, it will help you launch the thing with the best flash also. If you have any doubts with your setup, you get to decide whether you need as low as 2500 or as high as 3500. Something as simple as a B&M super hole shot would do your engine well.