Okay cuz I think that's what these are 10 and a half inch drums which I think are the same drums I have on my 74 Challenger... I have an extra set that I'd like to put on my duster cuz I'm converting to large bolt patternI am working on 74 Cuda back brakes with 10 1/2 shoes, and the backing plate outside diameter is around 10 7/8".
Funny, I thought all e-bodies came with either 10 inch drums or 11 inch drums. Didn't know Chrysler made 10 1/2 inch drums.
PM me and we can talk about it. yes, large bolt pattern.