Hi Richard,
Go Garrett. You should also get in touch with Brockas as his is making around 586hp and that's still a 2.6.
I'd start off with the .82 housing to get the best response possible. Well that's what I want to put on mine anyway so would be good to see how it performs
No luck with rebuilding the turbonetics or just too costly to do?
Cheers, Jon.