Hey Craig,
According to my Motor manual, GM used at least 3 different types of adjusters on the drum brakes. They were all based on the same general principle, but there were slight differences in the parts. You can see the difference in the actuator lever in your exploded diagram and the actuator lever in Apache1's picture.
Using S10 parts on a Camaro axle or vice versa may be the issue here.
Apache1: did you positively identify your axle before buying your new parts?
