360 magnum ?'s

I have a 360 magnum out of a `95 truck, that had a with a manual trans behind it (no I don't have the trans just the flywheel). I just picked up a 4 speed setup for the Dart at the Fall Fling. I want to put the two togather and drop it in the Dart. I need know what's up with the flywheel situation. Someone said the flywheel off the magnum won't work...too big. What size flywheel do I need? Where do I get a flywheel properly weighted for a magnum? Thanks for the help! I am looking forward to rowing the gears!! :burnout: