S,
I AM building a street rod out of my 91 GMC SUB and that is the setup I'm shooting for.
The turn key from Banks is $38K, which I don't have.
However, I can have mine rebuilt properly (7.5:1 compression) for $4k, the twin turbo is $6k and then just add TPI ($4k from Banks - hoping to find it cheaper some place else) and I'm set on engine mods. TOTAL if I have to use Banks TPI is about $14k. Less than half of the built Banks motor.