The brake shoes at the rear have to be adjusted up so they are just touching the drum a little, even with the handbrake off.
To do it properly, loosen the handbrake cable at the handbrake lever in the car, with handbrake off. Adjust the shoes at the rear so they are just scraping on the drum. Adjust handbrake cable at the lever, so it pulls up to about 5 or 6 clicks. Bleed brakes.