3.55 gears for 7 1/4

Crewchief, are you saying that the bolt holes in the ring gear itself is 3/8?
If so, how come Yukon, motive gear, and other companies only offer 1 type of gears in different ratios?
Are you sure those aren't shouldered bolts that go in there?
Yes, I'm absolutely sure. The ring is mounted with 3/8-24 x 7/8 LH thread bolts.