MCR has every new flywheel lightly resurfaced before it is installed. It’s rare, but we’ve seen new flywheels that aren’t flat. That reduces the holding capacity and speeds up the wear on the disc. And don’t forget to use a thread-locker and oil-sealer on the bolts. Remember, LS crank threads are open to crankcase oil. The torque sequence is first 15, then 37, and lastly 74 lb-ft on the bolts.