I've tried: 3794 from danville, 4094 stg2r, 64.5/73sxe, 69sxe, 64.5/68sxe, 66/73 FI.
64.5/68SXE is my favorite. Spools like stock, I can make 20psi at 1500rpms. Tows amazing, and has enough air to make the power I want. Dynoed at 655hp on a 2200us tune with the 60s I have. If you go fixed vane don't go away from borgs sxe line. My 69mm from borg spool twice as fast as forced inductions 66mm I tried.
What exhaust housing? Got any video of smoke output or egt’s and turbo coming on boost at 1500rpm? I ask because I’ve been looking real hard at that turbo