LBZ turbo with 7+7 65mm compressor

[Lennart]

A local shop built me my LBZ spare turbo with this 7+7 65mm compressor wheel.
From what I understood they left the turbine stock.
With my limited knowledge of turbos besides the reading I did I wanted an opinion if
I will be fine or if I should have something changed.
Turbo is planned to go onto my LLY where the stock turbo is still working fine. With the turbo
swap I plan on installing a LBZ CP3 along with a high-flow y-bridge.
Since my motor is all stock I do not want to push the power much higher (528rwhp currently) my
target is to have something that will comfortably support 550-575rwhp and spool way quicker
than my current stock LLY turbo.
Would changing to a 10-blade turbine in the LBZ housing help spool?
Should I take my LLY housing along with a 10-blade? Would that hurt spool?
Will I be fine with the stock vanes?

 

[gmduramax]

All of your options will slow spool.
Keep the LLY turbo but install RDL up pipes, and port match the LLY turbo to the up pipes

 

[Lennart]

I forgot to mention that intake and exhaust are not stock. I have RDL up-pipes, BD drivers side manifold, 3" down-pipe and 4" exhaust.
On the intake I have the LBZ mouthpiece adapted to a banks ram-air intake

 

[Lennart]

I looked into port matching the up pipes. Have a pass side WCFAB up pipe and the LBZ turbo, both measure 44mm ID. The supplied gasket is much bigger in diameter though.
From the feedback so far it looks like I already have the best turbo installed and I can put that LBZ turbo in the classified section. Local pickup only, Germany ;-)