Needed: Gears

Was just wondering. I am going to run a 2.76 Gear in mine & my tire is 28", I found a brand new set for a 489 Case. Are you running the 1/8th?
What size tire do you have?
I run both pretty much about 50-50. I have 31x16.5x15 hoosier quicktime pros. I plan on going to a 315 drag radial when I swap in the dana..