The cars not mine, I just built the engine.
Too answer your questions about the turbo , a Garret turbo is made up of 3 main components (compressor, core and turbine) and you can mix and match genuine Garrett components around.
So a GT30/40 is a hybrid, it has the standard GT30 ball bearing core and one of the GT30 compressors with one of the GT40 turbines.