You can get really close to our droop with the stock axles to be fair, not bang on but close but the issue with the B4 ones is that if you raise the tranny you have to limit the shocks.
As the others have said though just get the B4 ones drilled and run thin nuts.
But we are also fully on sorting the issue out as well.
Didn't know your car used BK2 axles any way
E.