question about converters

Many of the old car ads indicated that Hi-Po motors with automatics came with hi stall speed convertors, but I have not seen any actual numbers. I finished putting my 69 340 Dart back together last summer. With 75k on the car, I thought about spending money on a transmission rebuild and a new convertor, but decided to just change the fluid, filter and the input seal and bolt it back in. The original trans and convertor still run great. It shifts firm and quick enough to chirp 2nd gear, break the tires loose, and kick car slightly to the right. In my opinion, the original setup was just right.