Been studying this and have come up with the way forward... [I think]
lower mounts would be urethane bushed ,,, to lower arm. probably tube uprights with gussets as metioned, to prevent side ways movement an rose jointed link across to the hub at the same height as the driveshaft, this would keep the bracket at the same vertical angle as the hub [bit like a four bar link] mine would poss have the shock at the rear in the normal place normal, would just need to machine up a new bottom bolt to suit. Now just need to draw it out and work out how much clearence for the drive shaft. have spoken to the airkit supplier and he has given me the specs etc .... hopefully it will all work out ok, will be building two sets at the same time as going to convert a mates jag suspended car too and he has the same room as I do....
cheers for you input guys....