Finally got the new hotside on the Blouch SC46 and EFI retuned it. There are some gains, but not as much as I was hoping for. Regardless though, gains are gains and it is still a pretty kick ass turbo.
Just to note, EFI had some issues getting the new turbine housing to mount up with the center section and had to pilfer some parts off another turbo to get it all bolted up. For those considering upgrading the hotside, it might be better sending the turbo off to Blouch for the swap.