Recommend me a converter for this 273 - 727 combo

Old thread but I thought I'd write that I went with a 10", 3000 stall converter in the end. I also went with 3.55 gears. BIG change to drive it now, pulls way harder of the line and the little 273 now smokes the tires even from a rolling start. Also installed an oil cooler in series with the original one. Overall I'm very pleased with this setup.