TII trany in an NA???
 

What would the performance of my rx7 be like if I added a TII tranny and TII drivetrain???
How would this effect my cars performance??
Is it worth it??
Will it help get more power to the wheels???

It would be more durable but would probably be slower. The TII tranny weighs about 20lbs more, not to mention the added weight of the larger propeller shaft and halfshafts. However, the TII 1-3 gears are slightly better for acceleration, which may help make up for the other performance losses.

Not unless your engine is making over 200bhp.

You would have less power to the wheels due to the increased mass and friction of the heavier drivetrain. Your throttle response would suffer slightly, also, because of the increased inertia of the larger/heavier components.