[TurboKraft]

Yes, mailbox was full, but emptied now.

Spools faster or more responsive... it depends. There's just not enough information given.
3.3L or 3.4L?
Compression ratio?
Port sizes, and flow -- quality of the work?
Header sizes, primary & secondary? Twin scroll?
CIS or EFI?

You can pretty much rule out the GT30R-series turbos unless you want to power to flatten off at 5,000rpm.
The other 2 options -- GT35R and twin GT28R-series -- are dependent upon the above.
Yes, you can build a single turbo 930 engine with the response and broad torque band of a twin turbo.


But since your moniker is 911TT33, you are required to use the GT2860RS turbos. ;-)