I have a 1996 gmc Jimmy that I am going to be doing a rear diff fluid change on. I want to replace the cover bolts because they are very rusty. The ring gear is 7.625" even though I doubt it makes a difference. Thanks for the help in advance.

 

I bet you could take out one of the top ones temporarily without much of an issue to size it.

 

This would be the best way to be sure you get the right size.