the problem is to do with the ford rear beam and the supra rear support if you look at a ford diff even the mighty 9 inch the diff is supported in the centre only where as the supra is supported either side
we are working on a solution to move the stress points to the centre but space to the stock rear roll bar prohibits this
we have it in hand
the ultimate solution may be that we will have to modify the ford rear beam which will then make this conversion an in house fit only and not a diy home bolt in fit