Before you pull the trigger on the converter, you might want to talk to a converter builder or two and get their input. With the torque you will be making, it could be a challenge to get one tight enough. And make sure that they are clear with you on how their converters will act in your vehicle. Have them review in detail flash, stall, etc. There might be an off-the-shelf converter for you, but it would be a good idea to talk to the converter guys.

Personally, I have used PTC for many years with good results. But my last couple of converters from them missed the mark and they were too busy to spend much time working it out. Called Lenny at Ultimate. He spent the time to get the info and then re-worked the PTC to my satisfaction.