I'm glad I swapped up to an 8 3/4 on my build. I had an 8 1/4 out of an F body in mine and when I pulled the cover to take the c clips out so I could pull the axles for the brake setup I was amazed at how small everything looked. The axles were a joke and probably not even an inch thick at the smallest section. The ring gear looked tiny as well, but I don't know if there was any difference in the setups from the different years or body styles. I pulled one out of a 69 Charger that I didn't think looked as small, but for driving around the street I wouldn't worry about it. I intend to race mine and do some big engine upgrades in the future, so I'm planning ahead. There is definitely more of a difference than just a 1/2 inch of ring gear diameter between the two though, lol.