Has anyone used one on these trucks, and where can I get a heavy duty model so that I can take out my spacers.

 

You won't need a spring compressor to do the job. You just need to unbolt the spacers, the shocks and sway bar. It is not mandatory but makes the job a little easier if you unbolt the track bar. With the truck jacked up high enough and supported under the frame you are able to push the axle down and then remove the spacers. Make sure you support the axle with a floor jack. It makes the job go a lot easier if you have a buddy help steady the axle.