The rear brake is going to want some attention too. It's very prone to the slave cylinder seizing up so it would be a smart move to check it and almost certainly fit a new one. Replacing the fixed block that sits between the other ends of the rear shoes would be a good move while in there.
If you haven't already found the Alternative Parts List then get a copy downloaded, there's a lot of useful information in there. https://www.dropbox.com/scl/fi/u0m0...but1a4r93py8ad6&st=6t88h7em&dl=0
If the front brakes are in good condition then you can overcome the front tyres grip quite easily with them so upgrading them might not achieve very much.