You could try it, but it would be best to remove the cylinder from the truck first, to allow for more room to work on it. You'll need to drill it out to be able to use the correct size extractor, don't use the size that fits the existing hole, you'll break it off for sure, and once that happens, well, let's just say those extracotrs are virtually undrillable. Chuck it up in a vise, drill to extractor size, and use some heat. If that doesn't work, you may have to bite the bullet and replace the entire cylinder. Fortunatly, yours has the Bendix style brakes, the wheel cylinders aren't too bad on cost. Remember, what you do in replacemnt terms on one side, do the same on the other to maintain even braking forces.
