This Tuner sounds a bit dodgy at best...
A haltec is NOT a piggy back ECU, it's a complete ECU, and from what I've read won't work so well with the automatic.
I'm fairly sure that NIStune is the only ECU that will handle the auto.
nistune is NOT unreliable, NOT hard to tune and the cheapest and best option.
I've got it in my GTT running dual maps PULP98 and E85 making 290rwkw .
the 200rwkw mark is correct for the stock turbo.