No, it is not rocket surgery, it is hydraulic science/engineering. Stock converters are not junk, for stock or extremely mild engines. Speaking of stock converters, do you know how many different non lockup converters Mopar had? There were many, based on the engine torque, and vehicle weight, and gear ratio. The OP doesn't need a high dollar race converter, but he should invest in a decent converter matched to his engine/car. Otherwise he is leaving performance on the table.