You'll need to adjust the handbrake cable properly, as per the Haynes manual.
If I remember correctly, you loosen the cable at the lever, remove the split pin and clevis pin from the nearside rear brake lever (behind the drum), then adjust the shoes. You tighten each side up (with the square adjuster at the top of each drum) until the wheel locks, then back it off until the wheel moves freely. Then adjust the cable at the handbrake lever until the end of the nearside cable lines up with the lever coming out of the drum. You will then be able to re-fit the clevis pin. Use a new split pin to retain it.
Check the handbrake - should be right. I've done it enough times trying to just tighten the cable, or tighten the adjusters. It never works - you have to go the whole hog, because otherwise the compensator in the cable works against you.
Hope that makes some sense. Hopefully you'll have a Haynes manual of your own to check.