Doing A X Flow swap. What tranny should I use???

Okay here is the skinny. Im doing a crossflow swap into my 92 8v. I love the tranny in my car now but it lacks some SERIOUSE top end (120 @6000) Its kinda embarassing going on trips and having to slow down because I dont wanna blow something. I have a Centerforce clutch from an ABA brand new and I want to use it. Is it possiple to put my gears into an ABA tranny, the firs 4 or three?
What about a 16V tranny, I can get one of those too from a Rocco but I hear the terminal velocity is even lower than my tranny! If that is not true can I still use my clutch in that 16V tranny?
What Have you guys done? Should I use gears from a 16V into the ABA? Is that Possiple? Whats my best option? please help.