You are just opening a can of worms.... Especially if you start narrowing crossmembers and otherwise upsetting the designed suspension geometry.
The width of the suspension is a major player in how it works, narrowing it will upset it to the point that it will not be fun to drive.
Do a few searches on suspension design and get familiar with these terms.
Roll Center and Roll Center Migration
Side View Swing arm
Front View Swing Arm
Toe-in and Toe-out
All of these terms are involved in making a good or bad suspension. Cutting up a current suspension and moving things around, without taking all of these factors into consideration, will only make it an ill handling and unsafe suspension.
To determine a good candidate for a suspension swap measure the track width of the truck and then use that measurement has a quideline. Usually anything wider will cause problems with wheel and tire clearance. Anything up to a couple of inches narrower may work without looking funny. S-10's and second gen Camaro's, Firebirds or Nova's are excellant choices for these year trucks. They will go in without narrowing and there is a ton of aftermarket stuff avaible for them.
Sorry for the book but there is a lot of things to consider when you are doing this. Safety and drivability should be your first concerns...