I don't know if this is any help, but I've used two converters that were orignally built for big block Chevies in the 496 - 540 cid range. Both big block owners told me the converters stalled at 5500 rpm in their big block Chevy dragsters.
Guess what. Both converters stalled at 5500 rpm in my crossflow 300 Ford six. Which tells me that at 5500 rpm my inliner is making about the same torque as a big block Chevy.
Granted, that speed is probably near the peak torque on my engine, whereas the torque for the big blocks is higher at higher rpms than my inliner.
