When looking for mine, i called around and the tech guy was surprised that i knew the tq number i wanted to hold. Ultimately, my goal on e85 was to high but im still looking to hold 650wtq for a single to hold. The problem with a big single is the pressure placed on the thrust washers and causing crank walk. I ended up with an exedy triple and worked with the pedal ratio so it drives like stock and not an on/off switch.
Another reason for the triple, ive read/heard that twins dont like launch control much and triples dont mind at all.