Yes the T5 was used in some of the 4 banger S10's.
I've got a spreadsheet of the Tag numbers and different applications
Here .
Not too sure on the T5 to 250 Setup I do have a buddy that set one up I'll hollar at him and see what he says. I know it's not as easy as the swap to an earlier inline (216/235/261) I seem to remember he had to have a spacer made or something.
Mongo
