cars with stock converters I have usually had the best luck "flashing" them. Basically, let it idle, and hammer down. The converter will actually stall to a slightly higher speed than factory for a brief second and let the car get moving easier. This also puts a more aggressive hit on the suspension and tires to get them to work. Stalling up on a stock converter puts preload on the drivetrain and suspension and allows minimal reaction. I would also invest in Cal-tracs with a leaf spring car. They work wonders. NEVER neutral drop, unless you like frequent transmission rebuilds. Basically, get good tires, and cal-tracs and let it eat. Eventually I would invest in a good stall converter to get it to launch the best.