Need help IDing 1/2 axles

[GMC85HighSierra]

Hi all, I was looking at some axles I have, and I was trying to ID the axle ratios for my front and rear axle. I took the diff covers off and found the numbers on the ring gears. Here's what I found:

Front axle: 2 GM 3984828 13 40 78

Rear axle: 3817779 14:43 GM 11762

I attached pics of each ring gear numbers; these were the best pics I got. I'm pretty sure I wrote all of the numbers down right. I determined that the front has a 3.08 ratio I think, and the rear has a 3.07 ratio. I just want to double check that I did this right, so I don't clean up a set of axles if they don't match. Not sure if it helps but the front is a 10 bolt and the rear is a 12 bolt. Thanks