whats the diff between the s10 blazer and ZR3? blazer?

You can see the side by side comparison at www.zr2.com on the front page...

RPO ZR2 only full ladder-type frame with modified suspension mounting points which provide:

100mm wider track (3.9 inches wider than regular S-10)

Three-inch suspension height increase

Enhanced front (7.25" ring gear) and rear (8.5" ring gear) axles w/ 3.73:1 rear-axle ratio

Larger wheel and axle bearings

31 x 10.5R-15 LT/C black wall off-road tires (BFG A/Ts on pickups and BFG Long Trails on BlaZeR2)

46mm gas pressurized Bilstein Monotube shocks

Rear axle track bar (pickups) / rear sway bar (BlaZeR2)

Wheel flares (black on S-10 pickups and BlaZeR2 / body-color on Sonoma pickups)

33mm (early model) / 28mm (late model) front anti-sway bar

Skid plates

can i convert my 95 to having the same thing? wider stance is what i'm looking at.

Sure, you can convert your jimmy to that, just change the frame, rear, springs, shocks, axels, axel bearings, and front diff.

i'm trying to get really go shocks. i was told that by going to a stiff shock that i could raise the truck by a inch. by just bolting on the new shock from stock. is this true? i also was looking at getting the Rancho RSX shock. ever used it? recomend it or one that will lift the truck?

Shocks will not lift you. You might get around an inch cranking the torsion bars, but you will tear through ball joints. I have a rancho rsx for my steering stabilizer. If you're looking for lift, check the trailmaster 5" suspension lift (It's the best as it keeps geometry stock)