How far should i go with swapping stuff out in the front end?

8.8 will work, A body rear brakes were 10x2, you could use other sizes, but you will need to add a rear adjusting valve to keep rear brakes from locking up, you can go to Dr diff and look at his info and call him to double check what you need, if you need to save cash just keep looking for deals local to you to save on shipping.