wheel cylinder rebuild question

Hello.

My 70 DUster with 9 inch drum brakes failed its safety partially due to a leaking RF wheel cylinder.

Is it pretty straight forward and quick to rebuild it with a kit? Any tricks to it?

thanks for any info.

The Big E

PS. I was in a hurry to get the Duster on the road so I ordered a whole new wheel cylinder to make things faster and easier...but this failed because the threads for the brake line in the new cylinder were one size bigger than the brake line fitting!!!