My dad had a Lima truck mounted crane just about identical to the second photo on the first page. Young heel boom and a large grapple, but not sure of the make right now. Unfortunately, the only photos we have of it are poor quality color shots that would not reproduce well. The engine was a Cummins 175 as I recall, that was hooked to a torque converter and it was underpowered. A large log would stall the engine and those would have to be loaded one end at a time. This was when there was still some pretty good sized Sugar Pine and Doug Fir in Northern California. The whole design had problems and it constantly broke hook rollers and this caused a lot of down time. The breakage continued even when they installed double rollers on the front as originally came on the rear of the machine. He traded that crane in on a Northwest Timbermaster with the elevated cab, which was on tracks.
As others have said, the problem was getting good operators and most of them preferred to do crane work on construction where the work was closer to home and not so dirty. He finally gave up on cable cranes and loaded with a Cat 966.