Tab,
I think a T34.48 will be gasping for breath @ 380bhp tbh, a .63 housing would be more comfortable imo.
Rob,
Like most of the guys have said, a WELL SET-UP T34.48 car makes a hoot of a road car, i had this set-up for a year on a NMS Live map, Greys etc peaking @ 32 psi, holding 28 and there wasn,t alot that could live with it tbh cus the turbo is on the money from very good revs and pulls like a train to 7k or so.
I,d try this and see how you get on, imo i think you,ll love it....