Are you installing an LA 360, or a 5.9 Magnum? This was posted in the Magnum Engine Swap forum, and just wanted to clarify before you get the wrong answer about a flywheel. Balance between an LA 360 flywheel and a 5.9 Magnum flywheel is way different, so you shouldn't use a 5.9 flywheel on an LA 360, or vice versa. Which ever one you need, get the 130 tooth flywheel for a 10.5 inch clutch. Good luck with your swap. :)