Converter diameter has little to do with modern converter stall speed. Not like it did years ago. Like
@Oldmanmopar said, you can get a 5000 stall and drive it on the street......and it will lock up plenty enough to pull good and get decent mileage without generating a lot of extra heat. When you drop the hammer though, it'll flash to 5K. That's a modern converter. They do things unthinkable even ten years ago. But no matter how much you preach it, few people listen and they always chicken out and go for somethin stupid. The converter is the single most important consideration with an auto equipped vehicle. It can make or break an otherwise good car.
