Hopeing someone can give me an answer on this.
1969 Chevelle 3959038NF
1970 Chevelle 3969278NF
I have a 1970 Chevelle 12 bolt rearend. I'm trying to figure out if the posi section from a 69 12 bolt will fit inside of a 70 12 bolt rearend. Both are Eaton. I'm just stumped on not knowing about the difference between a small or large ring gear. And whether it will work or not. Thanks to all out there. 20 hours to go.
Found out it's a large ring gear.