Highly suggest finding the best one you can, patching it and rustproofing it versus getting the China special.
For the actual install, ensure you read the -20 and -34 manuals. They will give you the step by step.
There are two "spring bars" at the bottom of the tailgate that are kinda curved and can bend somewhat easily. If you get frustrated, take a breath (since you will be holding the tailgate you can't take a break) and don't bend them. I only bent mine slightly but now when I open my tailgate and it SNAPS into the complete down position, it sounds like someone fired off a 22 pistol. Doesn't hurt anything but makes folks look.