The K series Blazers will be similar to the C10 series trucks in regards to installing an air suspension system, with a few exceptions. Since the Blazer is a full body vehicle, where the truck has a removable bed, it's a little trickier to work on the rear suspension during the install due to the body restrictions. Just like the trucks, you'll have to do some type of modifications to the rear flooring to allow for chassis and axle clearance.
You mentioned that you want to " body drop " the truck and rest the body on the ground. Check the clearance from the bottom of the rocker down to the bottom of the frame on you Blazer. On the trucks there isn't much frame hanging down under the rocker, so the body drop wouldn't be too severe if you choose to go that route. There are some simple solutions for the C10 truck chassis that might apply to your Blazer.
When it comes to the suspension, Porterbuilt does offer several different solutions for your vehicle that will get it down on the ground. We offer a complete line of front and rear suspension packages that are designed for the C10 chassis platforms such as yours.
The front suspension crossmember that we offer for the C10 trucks can be adapted to a Blazer, allowing you to take full advantage of the benefits by replacing the crossmember. With the front crossmember assembly installed you can easier lay the chassis under the cab on the ground without having to "step" the front frame rails. Plus it will allow you to center the wheels in the wheel opening, narrow the track width up front to aid in wheel fitment and tire-to-fender clearance issues.
http://www.porterbuiltfabrication.co...7-Chevy-Trucks
In the rear we offer several different suspension packages as well. Some will work with factory style trailing arms, or you can run a set of our tubular rear trailing arm packages as well. We have several different solutions to work, all based around your skills, budget, and desire to get on the ground.
http://www.porterbuiltfabrication.co...arting-at-1900
Feel free to check out some of the pictures and tech on our company web forum, If you have any questions about a product, need some tech, or just some chassis pointers , you can PM or email us just as well.
http://www.porterbuiltfabrication.com/
Good luck with the build and keep us informed on the progress.