I have the 50 GL square transfer tank. Bolted it to 4 X 6 treated skids. For yours I would make them longer tan the narrow side for stabiity. Those narrow tanks bet top heavy. Lift it with the FEL clamp on forks. Not sure I would want it swinging in the air on chains or straps. I also have a 50 GL for gasoline. I have it on a deep C channel frame with caster so I can move it to the use point (generator prime user).
Ron
This & fork it