a t25 is on the small side. you'd need to run a lot of boost with that turbo to make the kind of power you want, running into efficiency issues with the turbo itself.

the engine itself is easily capable of holding that kind of power on stock internals if it's still healthy. the most important aspect will be the tune. for peace of mind and if you ever want to make more power in the future, if you can afford it, do forged rods and pistons.