273ci thoughts?

No tags on the rear end, appears to be a 9 bolt 7 1/4...someone's been in there, maybe they changed to a better gear at some point. Guess I'll have to pull it apart and see what's in there.

Always nice to know what you have. Just costs a rear cover gasket and some fresh lube. If you are lucky you will find a Sure Grip and 3.23 gears.