IMO stop have a good think before you spend money. Firstly, is 300rwkw what you really want? I reckon they are fat heavy cops (assuming Stagea here?? or is your username a red herring??) and I would look for a turbo that has good response over more power but if you want 300rwkw then a GT3076 with a Garrett 0.82 housing will get you there or thereabouts on 98ron.
If you change to a Garrett housing then you need a new dump pipe so costs will mount up going this way.
An appropriate HG turbo might work out cheaper and more responsive?!?!
E85 will give you the top end you want on a more modest sized turbo so worth doing the maths on this as well.
Jez would be well advised to stay out of this mess...until such time as CRD are finished doing whatever they are going to do or Peter decides to cut his losses with them.
Cleaning out the garage, make a sensible offer if prices are too high.
GTR BOV $50,
Brake shims OEM $20,
GT30 4 bolt V-band adapter and clamp $50
Rear main seals OEM x2 $10 each
I got an email message from a girl called Svetlana and she is really cute from her photos and she asked me for some money to help her mother...seems legit.