First off, that's a great-looking car you have in your build thread! Love the Berlin wheels and the ZL1 spoiler. Nice touches to it.
We always recommend replacing the pressure plate with the clutch, since they work together. For a lot of people, it's easier to replace the flywheel at the time, too, since it prevents having to disassemble everything if/when your flywheel needs replacing. You may be able to get the flywheel resurfaced, too, instead of having to buy a new one.
We do recommend that you inspect the worn clutch when you take it out to diagnose the reason for clutch failure. If it's anything more than normal wear, you're going to want to find what's caused that before you replace everything and button it back up. We have a PDF diagnostic guide for our clutches that
you can get for free here that we use to diagnose issues with Centerforce clutches, but you might find it helpful when examining an OEM clutch.
The
FAQ section on our website actually has some good information under the "Clutch Installation General Guidelines."
As for the fluids, we're not going to make a recommendation since we don't deal in transmission internals, but the factory owner's manual usually has a section on service intervals that is usually helpful.
Hope that helps! Let me know if you have any questions or if you want to know more about what Centerforce can do for you.