Chain Hoisting ideas from a CM sales vid.

[Rex in OTZ]

I'd never even heard of drifting useing two chain hoists, a promo vid harping CM's Hurrican 360 chain hoist is a pretty good idea.  they also demonstrate using chain hoists in crampsd places.
I think the current chain hoist you may have now cane be used in such a manner by keeping the hand chain parallel to the load chain (hand chain is always open linked not welded).

 
http://youtu.be/G8dMU5O0kp4  Drifting applications
 
http://youtu.be/TPAi-CHbvzY   the cramped spaces vid