Can i use the old trans?¿

I was woundering if a trans from a 93 del sol si would work with the b16a 2 or would it be suggested to get a motor with the transe and every thing else.

I beleive the the SI was a SOHC model, so you would need a trans, because yours isnt the right one.
I would suggest getting everything at once, it makes life easier. Although see if you can get LSD trans, that is a good investment.