Drilling the rivets out doesn't take long, but it's no fun laying on your back with hot shavings dropping on your face and neck (goggles are mandatory). Then on the inside you have to remove the floorboards around the pedals and clean out the decades of caked hydraulic fluid (from the master cylinders) and dirt and debris. There's no room to work (pulling the seats out helps, and lay a pillow in the floor). The nose gear steering needs disconnected and the clevises and jam nuts removed (count the turns on the clevises) to get the new boots on. Machine screws and self locking nuts are the only way to go for reassembly. Easily half a day for one person, with a helper for reinstallation, and that's if you've done it before, have everything you need, and don't have to waste a lot of time.
This would be the time to replace the steering rods (bungees), if they show any sign of wear or malfunction, and check the rudder pedal return springs and rudder pedal assemblies for proper assembly, looseness, and wear while you're under there, too! This can quickly turn into Pandora's box, so be prepared to find there are more repairs needed.
