engine hoist cylinder

[arvidj]

Not exactly what you were looking for but food for thought and will certainly save you time ...

http://www.harborfreight.com/8-ton-heavy...60394.html

or be lazy and

http://www.harborfreight.com/8-ton-long-...94562.html

I put the air version on my engine hoist many years ago and have never looked back. It made working either alone or with the wife [she would run the jack] much easier.