re: Hoists, G80, Beefing Up, Rabbit Trails. . . .

You don't have to worry about all the math when you just buy a 1 ton chainfall. That's all you need for that engine. I  have used a lot of chain falls over the years. Over loaded a few of them. The chain never failed. The gears inside fail first or you open the load hook a bit. The Old models had bigger heavier chains compared to the new models.