at our shop, we install LUK brand clutch kit in heavy duty applications like yours. They have a complete flywheel, clutch disc, and pressure plate upgrade kit. Like all clutch kits comes with alignment tool, new pilot bearing/bushing, and new throw-out bearing. I recommend swapping out the slave cylinder while your there. We always change them out while we are there as we've had them bite us, failing with the pressure of the new clutch.