torque converter builders

the dyno sheet I have starts at 2892 RPM, at which point there is already 441.8 lb-ft of torque, but only 243.3 HP

Yes, the stroker has more torque, so that will affect the converter. Call PTC and talk to Kenny. He'll help you understand more clearly.

My guess would be a 9 1/2 inch that stalls around 3200, but that's a guess.