Got a call from my mate this morning to say my stainless pipes/bends had arrived and that he had his work for the day cancelled, so we dragged the Sport to his workshop and made a start.
Going for a different route from the first set I did, so it may work out better and easier, or not
This time I basically cut the bottom section of each manifold off and routed new pipes to meet at the collectors.
So far it seems to have gone quite well. Its only tacked together at the moment to make sure it fits ok, and it still needs the No.6 pipe doing because not all the stainless bends arrived.
Forgot to take the camera with me this morning, as I was in a bit of a rush but heres how it looks fitted so far....

As you look at the manifolds in the pic, nothing has actually been altered. The pipes you see are all original S50 manifold. Its only the No.6 pipe that wont fit in the E30 chassis, the first 5 pipes fit. All the changes have happened below, around about the level of the alloy mounting arm.
I will get some more pics before its all welded up, so that should show which bits have been changed and which bits are original S50.
Its bloody tight down by the steering joint with pipes 4 and 5 (it would be easier with the E30 steering rack fitted), so I might have another look and the rear section may get changed before its finished.







