I agree...dont go as big as the 1.06 exh housing. I have the .82 exh housing and have full boost by about 4500rpm (with cams)
It is a great turbo that comes on with a hell of a rush
With other supporting mods like ecu, bigger injectors, fuel pump, FPR etc I have no bad comments on it.
You could go the .63 exh housing for faster spooling...
Cheers
JB