Hello
I need some help to solve the mystery of the diif. I own `68 Riviera, but as I started to service it I found out not all is from 1968 (engine 455, front stabilizer bar 3/4" like in 1966)
Now the time has come to change oil in diff, but new gasket for `68 model (10 bolts) looks almost the same but is too small...
The only discription I found are on attached photos, no codes on axels
Thanks in advance