The stock system is mounted in rubber at every point except where it attaches to the engine. There is vibration and with the 617 there is that "hop" at idle which produces a lot of movement. I recommend trying to duplicate as much as possible the way it was done at the factory. The vibration of metal to metal is what causes fatigue and breaking.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.