No problem! It's easier once you've actually seen everything bolt together, and since I run the 11.75" rotors on my Challenger I've seen it before. I run the pin type calipers and brackets, but other than that its all pretty much the same. I used the original calipers with no issues.
I also run the larger 11x2.5" rear drums now, helps fill up my 17" rims better and stops the car very well with the 11.75" out front. But that's on big old Challenger, I think on an A-body the 11" rear drums would be overkill. But a finned set of the 10" drums would look pretty killer...