Cut your springs by a coil or 1 1/2 coils. Then you'll need to get new camber bushings to compensate for the angle change.
In the back you can flip your hangars for the cost of 8 bolts, nuts, and lock washers, plus the time it takes to grind off the rivets that hold the hangar in place.
That'll get you 2" front and back. The only thing spent is MAYBE $5 on bolts, nuts, and washers.
Other than that... You're going to need to go with beams and a flip kit.
Or bags...
And then a notch...
And then a chopped up frame.
Are you sure you couldn't care less about ride quality? Dropping your truck even 2" can make even the slightest bumps hell on your shocks. When the shocks can't function right, your spine takes up the rest of the bump. So, unless you want to hurt your back on every little bump, I recommend spending the money on some shorter shocks to help with keeping your truck planted on the road when those bumps come around.
I raised my truck back up after a year of having it lowered because I got tired of it riding too rough. At first, I didn't care either.