With my 360 Magnum I was told by Paul (Turbo Action) 3200-3400. Car drove like Grandma's sedan until you hit the pedal. Normal 60' was 1.64 launching at 2000 rpm.
That's right about where I am. I can't bring it up that high on the foot brake though. I launch at about 1,200 or so. after that it pushes the car pretty bad. But off idle and nail it it snaps right to 3500. I've calculated the efficiency on that convertor and it's unreal.