[HO455]

I have had 2" blocks on my Blazer for over 100,000 miles with no issues. Blocks get you lower without loss of suspension travel which makes for a better ride. The only down side I know of is reduced ground clearance under the trailing arm or spring. Which for almost every pavement driven vehicle it is not an issue with 2 inch blocks. That being said 2" blocks and 35 series tires on 15" wheels might not be a good idea. But some measuring before hand should reveal any ground clearance problems.
Usually you have to replace the u-bolts that bolt the axle to the suspension. Just be sure to go with quality fasteners and you won't have problems. It is a good idea to check the nuts with a torque wrench periodically. Although I have never found a loose one it makes me feel better.
Hope this helps Richard. Thanks again for the window seal!!