A 62/71/14 and 100hp injectors would be fun to drive on the street, and would be just short of your hp goals. The same turbo with 150hp injectors would have very quick spool up, but at the drag strip your EGT's will be high. Plan on turning the box down to make it live. A 64/71/14 and your EGT's at the drag strip will be a little lower, but it won't be as fun on the street. 200hp injectors and you should just plan on twins.
With my truck and a drag comp I made 515hp with a 35/40 hybrid and Mach 4 (150hp) injectors. EGT's were way beyond hot. I made 545hp with a 64/65/12 and everything else the same. Added twins(62/14 over S400) and made 565hp everything else the same. Added Mach 6+ (220hp+) injectors and made 638hp.
My advice... Put a 62/71/14 on it, and when (not if), you decide to go with 200hp+ injectors, you will already have a great top turbo for a set of twins.
Paul