I just got my first blazer is. 2001 zr2
 

I would like to know the best way to lift it and where to found the parts for the lift i only want 2 in the back and abou 1 - 1 1/2 on front !
https://cimg8.ibsrv.net/gimg/blazerf...04570c134.jpeg

Your best option for that kind of height, rough country 2.5 lift kit. You could get longer shackles for the rear, and tighten the torsion bars, but youll be changing parts more often then anything...

There are lots of lift threads. I did a smaller lift for mine that is less than the Rough Country 2.5" lift that also doesn't require modification of the front axle. A link to it is in my signature below. But what I did is only one option.

A key component of mine is that I used the RC upper control arms for their better geometry for the upper ball joints over the stock ones when the front end has been lifted.

I forgot to add: The ZR2 already has a lift and larger tires. Most of us are trying to get our rigs to be something close to a ZR2. Do you have some specific plans for it? If not, you might want to keep it as is.