The high-lift jack has been mentioned several times on the Cruiser boards. If you feel the need to have one, more power to you! They do not cost a lot.
I bought one for my Montero and went to some work to mount it. Then it sat there for ten years without being used. I sold the high-lift with the truck. It is still there and still has not been used. The new owner wheels the thing nearly as hard as I used to. I know well as I wheel with him a lot of weekends. The jack still looks good. It still has not been used.
The main reason is that in every situation where the jack might have helped, it would also have caused considerable body damage.
The Hi-Lift jack looks good and gives the impression that you are serious, but it has limited practical use. It is designed as a farm jack, IE to lift up stuck tractors. An 80 is a tractor with AC, but it does have bodywork to protect. In practical use, a farm jack is very rough on bodywork, unless you have steel cladding over most of the body of your rig. That is why I never used mine. I got that Montero into some really tough spots, but there was always a way out without using the jack that would cause body damage.
I won't be looking to get one for my 80. But that is just me and my experience.