Let most of the air out of the tires. Easy 2 inch drop with stock parts.
You might be able to use lowering blocks in the back, but you'd probably need longer U-bolts. Other than that, I'd look into aftermarket leaf springs with a built-in 2 inch drop. I'm not sure if you could get the existing stock leaf springs re-arched for a 2 inch drop. That's something to search(more specifically) for on the internet. For the front, it's not usually recommended to cut coil springs as they were designed to work at their original length. You could cut them to possibly save some money, but it might have very adverse effects on ride quality. You would probably want to go with aftermarket coil springs. I'd do some searching from parts vendors to see what's available for the front also.