Torque Converter

I have one that stalled 2800 behind a stock 340 I'd sell. Engine size and how it's built (power level) makes a big difference in what a converter stalls. What do you have? If it's a stock 318 this one should stall right about 2500

As bomber also mentioned you need one that's balanced right for your engine. The one I have is a neutral balance which is the most common. When you answer with your engine particulars we can tell you what'll work