That is much more helpful than a 'stage 2' turbo. To answer your what to map it to; it is torque that kills a clutch, especially torque early on in the rev range (impossible to avoid with the PD engine), to get the most out of the setup an uprated clutch and maybe a refurbished flywheel would be wise. I realise however that you don't intend to do that. So your final power output will be restricted to your clutch, the weakest link in the chain, and when it starts to slip. It might hold up with 330ft.lb of torque, it might wave goodbye at 280. If you are having a proper custom remap as others have suggested to you, the mapper should be informed of the standard clutch setup, they will then limit the torque and power output to prolong the life of your clutch, or as was in my case, refuse to map the car with a bigger turbo until you uprate the clutch.
With the bigger cooler and hybrid turbo, make sure it is not a flash 'stage 1' remap. It will be a waste of time and won't get the best out of the modifications you have made.
JRJG