Started on the exhaust this week. Used the original catalyc converter-pipes from E34/M60. Looks like they passes between the frames ... looks ok
... and the angle is great.
Temorarily fastened for modifying the E34-pipes to the E23 exhaust.
Had to widen the E23's exhaust from 20mm in between the pipes to 45mm. Then the two different exhaust just fitted. Just like that!
Next to do is the gearleaver. I have to use the leaver from the E34 for the 5HP-18 transmission.