Another piece of the puzzle has arrived.
Under recommendation from another member, I purchased the engine harness from an CL500. It plugs directly into the spare XF ECU I bought.
Well worth it for the time that will be saved not having to re-pin and solder/splice wires.
I have an intake elbow coming, and have found the C43 AMG exhaust manifolds I need, but haven't bought them yet.
I still need to pick up a new set of flywheel bolts, and a clutch alignment tool as well.
Jared