NV4500 (left) vs. G56 design. You can see the spacer bump that is part of the 56 setup. This is what makes up for the difference. As you can see, the starter gear is at the back of the flywheel to make the difference. The only other way this could have been achieved would have been to use an aftermarket 13 inch nv4500 flywheel with a crank spacer, but then I'm not sure what kind of starter issues I'd have, and whether or not the starter would engage.