[Cue-Ball]

Okay, i didn't read closely enough. As long as you didn't buy cheap-ass drums, they should be true and shouldn't require any surfacing before installation. When you install the new pads and drums you'll find that the drum won't want to go back over the brake pads. I'm not sure if this is true for the 200SX but most drum brake equipped cars have a little "spur" between the brake shoes. That spur is what makes the pads get closer to the drum as the pads wear away. When you put the new pads on, you'll have to turn that spur so that the brake pads get closer together, otherwise the drum won't fit back on. Also, while you're in there you should check to make sure that nothing is rusty and that the lube points on the brakes are still lubricated. Just be very careful not to get any lube on the pads or drum as it will cause the brakes to lock up.

Good luck!