8 1/4 gear question

Have him pull the cover and see what gear it is. It is stamped on the ring gear. Ratios that were available in 73 for an 8 1/4 were 2.45, 2.71, 3.21, and 3.55. I really don't know what the standard ratio was for a 73 340, but I am pretty sure the sure grip was an option. I would expect an open 2.71 was the most common.