Clutch plates should be the same and should match up to the surface on the flywheel, there are at least 4 differant sizes of clutchs. I run the largest out of a two ton, I believe it is 11" its a a beast, but she dont slip.

barks 3rd gear if I want.
Flywheel, clutch and pressure plates should act as a set. All should match, Clutch should match grind surface on flywheel, Pressure plate surface should match up to clutch and Bolt circle should match up to flywheel. Get your tape measure out and go through what you got and make sure it all matches. I keep all mine together as sets along with the starter that was with it when removing drivetrains. Neal,