Here is a flywheel for a 10 inch clutch and also one for an 11 inch clutch. I had resurfaced the 10 inch flywheel at the time the image was made. The 11 inch flywheel was as I got it...not resurfaced yet. You can see how much closer to the perimeter the holes are on the 11 inch flywheel. Hope it helps.
~ Jon 1952 1/2 ton with 1959 235 | T5 with 3.07 rear end