The S10 ones that aren't a complete kit (a-arms, bags, & all related parts) use the same basic 'common set-up' I was describing.
You can cup the front lower stock arms or find adaptable lower bag brackets for them (1st pic are some that can be bolted in place or welded).
Upper front mounts use the standard cupped spacer w/an offset threaded stud (also in the 1st image) that utilizes the original upper shock mounting holes to locate & secure the bracket.
The shocks are mounted along the outer edge of the lower arms (about midway or ~9" away from the lower BJ).
There are several styles of upper shock brackets. Some bolt to the frame & use the same upper shock mounting arrangement as a stock g-body/s-10 w/a stud. Some use a double shear bracket on top & stud through the eyelet lower mount. Some use stud through the eyelet upper & lower. It's up to you/your shops fab skills.
2500's would be spec'd for the front. They're a bit too much for the rear if mounted where the factory coils go. A lighter sleeve bag would be better suited for the factory location. You can make what you have work but it won't be 'ideal' for the rear. Double convoluted bags are typically used in a 1:1 ratio set-up only in HD apps. Lt duty apps have them typically @ a different motion ratio that uses the leverage to make them work (rear suspension link bar vs directly on the rear end).