Here's about how one balances, and a quick and easy way to remove/reinstall one if you have the front of the truck removed.
http://rides.webshots.com/photo/2611387400080251109jxxEJE
I prefer to use actual lifting slings and comealongs or a chain fall. however this time I didn't have a sling handy but did have the forklift and a strap, it worked out fine, only about 20lb on the front one.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-