How to Set the Idle Speed on a 1987 2.8L Chevy Blazer

This is my 1987 stock s10 blazer with only a 2.8 liter in it. Small motor but big balls.

1987 S10 Blazer 2.8 High Idle, How To Adjust The Idle On 1985 S10 2.8l , Set The Idle On A 2.8 V6 Chevy S-10