Which Clutch should i go with

Well, I came back here to the archives again to research. Now I'm confused. The first suggested pressure plate is a borg and beck (lever) type, and the second suggestion is a diaphram type. What type is original style ? I remember reading something about the clutch pedal not working right with one or the other, but can't remember which.
I need to change mine out, and as it is my daily driver, I sure would like to order correctly.
I am running a 273 HP 4-speed in my '64 Dart.
Thanks, Rick