Just for clarification: The shock I was referring to had cavitated, you could compress it without much force, and you could hear noise while moving the piston. That thing had simply failed, and would not provide damping forces any longer. And that's why the Gabriels are no longer on my truck. Maybe I just got a lemon; your results may vary.
If you've never had a shock that you couldn't compress by hand (and I mean freehand, not mounted to something so you have leverage),

then try Bilsteins (then ones for the stock Blazer application will do...)

. Maybe I need to hit the gym more often...
You're running big tires and a heavy front axle, so the shocks have a lot of work to do with that unsprung weight. That's why I suggested that you might want to keep an eye on the shocks. I would particularly check how hot they get if you hit the desert with a bit of speed.
K5er4Life, as I said I have the ProComp (also affectionately referred to as ProCraps

) MX6 on my K5 for some 2 1/2 years now. They are adjustable, and I run front-3/rear-2 on the street and front-5/rear-4 on the trail. We recently put Bilstein 5150 on my wife's FJ40, and they work very well. I put the MX6 on my truck because the Bilstein 5150 had just come out at that time, and there was little info available on what valving would be correct for a K5. But I'm leaning towards the Bilstein 7100 series for my next shock purchase.