Look Joe..., here's another thing.
Engine codes. gte is turbo. ge is non turbo.
so when you say 7m-t. you sound like you dicked your dads ride up and need to fix it before he gets home from vacation.
That being said 7m-gte. Is what you want. But you have to upgrade the tranny as well if you start with an n/a. Which means naturally aspirated and or...., non turbo. The w58 is the n/a tranny.
Your only other upgrade that I'm aware of for the w58 is a 2jz-ge.
Which is the same output as the 7m-ge. Without the built in defects.
Now if you buy an n/a car and go turbo. It's pc definition is.
n/a-t . Ya folla? I'm hoping this helps you a bit. I know that it will.
This is not the best way to do things. It's the scenic route to having a low boost turbo and is laiden with pitfalls all along the way.
Rebuild anything you get that you want to swap into your supra. It's a bird in the hand my friend. DO NOT just buy a JDM angine and drop it the fock in.
Always try to rebuild the matching numbers anything 1st. Before replacing or customizing.