the theory is you have one of these on each end of the chain

and 2 lengths of chain on the vehicle to be recovered
then you wind the chain in when you get to the point where the chain won't go any further hook the other end of the chain to the other length of chain on the stuck vehicle flick the switch on the chain block and then start winching the other way the vehicle may slip back a little but when the slack is taken up it will start winching the vehicle again
do you think this would work
what issues can you guys think of