Also keep in mind that driveshaft and exhaust modifications may be necessary. The next thing to consider is safety. This is an important step that some tend to forget about. Always wear protective clothing, gloves and safety glasses. An extra set of jackstands is good to have for backup.
Nothing is worth get hurt over.
Since the gas tank of our Blazer is located next to the spring brackets, it needs to be removed. Trucks won't need to do this step. The fuel pump was electric, so we hooked up a long tube and a gas can to the fuel line and turned the ignition on. It's much easier to remove a lighter tank. You may be able to make enough room simply by hinging the tank around the front mounts but we wanted to clean off any noticeable rust and spray some rust preventive paint on the frame.