Greg, I have a GT35R with a 0.78 A/R divided inlet housing on the GSF headers. Spool is amazing! I'm not after big top end HP, just quick street spooling 
For your application, I'd highly recommend a slightly smaller GT30R, rated at 500HP. That would be an awesome turbo for your application IMO, if you're specifically after a BB solution.
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Merv
'89 911 Turbo Cab
Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition 
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