Wastegate stuck open

[mkiiisupra]

The current turbo on my supra produces boost and continuosly kicks it out the wastegate so i get nothing from it. Was told there is no way to fix it just need a new one.

So i decided to have my spare turbo rebuilt, which has too much play to it and makes noise when you turn it, i guess scrapping the turbo housing.

My question is, since i am already having it rebuilt i figured i may as well have them upgrade the internals in it. If i stick this upgraded turbo on my engine will i risk blowing my engine? Everything else is stock except for a K&N air intake