7 1/4” SG

Well,I don't know about that,never opened one up. They were so abundant and cheap I just replaced them when I had a problem.I do know from the sales lit I have collected that they came with 323,355,and 390 ratios and offered as an option on any A body in the mid 60's .They were also part of the towing package that the wagons had and were more than likely offered in other models as well. And back in the day we as consumers could pretty much order anything we wanted from the dealer unlike today's take what we have on the lot mentality