I must admit i didnt think my v3 lacked any grunt low to mid rpms, it pulled like a train really. Pretty sure from memory of my dyno graph, it was making 250 ft lbs (which isnt much less than peak on a na 350) at just over 2k prm and just over 350 ft lbs at 7k prm, you arent going to get a much flater torque curve than that, if you worried about hp/boost just change the pulley size, i really cant see the Stillen is going to offer anything better.
I seem to remember the hks supercharger offering more torque, but no idea where in the rev range.
Found it, dont think that looks half bad to me