I was going to swap a 1997 T/A lt1 engine for a ws6 crate motor and I was wondering if I would need a new tranny?:confused: It has 125,000 miles on it!

No such thing as WS6 engine. All the trannys in the 4th gen F-bodys are the same.

its alll the same the only difference is that they put slp on the ws6 like exhaust ram air package hood n shit like that.. just go for the hood and an exhaust w/ headers instead of buynig a new motor.. unless it has a lotta miles then just go big n bore it to a 383 w/ a stroker kit =p