^^ incorrect.

All B-series are not the same.

i.e. 90-91 are a Different size shaft as he 92-00 B series shaft

So the answer to your question is... it depends what year tranny you have on there.. if it is the 90-91 tranny, you'll need a new clutch, if its a 92-93 tranny, you'll be fine. The Gsr tranny you're talking about is going to be 92 and up.