that would be brilliant. I bought a Spectre 32SC last year. It has Ilmor 625s with Bravos and hits 130MPH on fresh water pretty easily. Do you go turbines for lower fuel and maintenance costs?

I wouldn't bother with anything other than Arnesons behind T58s as the torque will destroy most legs unless you go SSMVI.
Take a look at all the top turbine boats they are all running Arnesons or BPMs.

I run with turbines because I like lightweight technology, the noise, the power, etc, etc.

Yes BPM or Arnesons would be the best choice, but also the most difficult to rig I think.
I will not change too much on my transom, I also have a notched transom.
So I wold prefer SCX4, if they handle the power?
there´s cats with blower 1,300 hp in front of SCX4, and it works.