Found wheel cylinder has small leak, so I figure for the price, I might as well change both and be done with it. 2 questions, What size line wrench do I need for the rear brake line? And do I only need to bleed the 2 rear brakes?
Also, what's up with the spring behind the shoes at the top? Is there a secret to putting that spring on? I fought with that for ever. Hardest brakes to change.

 

I hear ya! The one that came with my new brakes was waaaayyy too stiff, and there was no way I was going to get it on, so I had to reuse the old one.

I put the spring on the shoes, then spread them around the cylinder/parking brake/adjuster, then fought like hell to get the keepers in so it all wouldn't fall apart again - "How much longer are you going to be? You said you were nearly done!"

 

Just updating: Changed both cylinders today. Did them both without removing the shoes, so I didn't have to mess with that damn spring. Removed the outer spring and both retainer clips. Spread the shoes apart and pulled them forward enough to clear the cylinder. Made it a whole lot easier in my opinion.
By the way the brake line wrench size was 12mm. Everything new now.
Happy braking!

 

FYI, wheel cylinders WILL have fluid inside the boot when you look in them. Even a small amount getting past is OK. If you ever replace a caliper or a cylinder and there wasn't a big leak, you can gravity bleed them.