8 1/4 Refurbish

When I picked up the rear end I also liberated the fender tag. After soaking it in Evapo-Rust for a few days I could decode a few essentials. It seems it's a 74 built on Jan 24. I was told it was a 225 but the tag reveals a 318 with a Torque-flite. Based on that , any ideas of the gear ratio of the 8 1/4?