Need New Drums

1963 - 1972 " A " Body used 10 " x 1 3/4 " on their Rears, &
1973 - 1976 " A " Body used 10 " x 2 1/2 " on their Rears....

I have both of them Brand New....
P.M. me , as per forum rules, if interested...
Craig......
I am, yes, but I don't know what year the axle is. Since we've narrowed it down, how do I tell the difference?

Also, if I wanna replace the hardware inside, I guess I'll need to know which to get. Everything looks okay, but for safety's sake, new cylinders are probably I order.

Yes, you're correct that the bolt pattern is 5 x 4.5. I have one of those wheel disk thingies that you put over the studs.