What does Rudy charge to program the ECU? I have the exhaust figured out. Let's just pretend I already have the 500 engine and wiring harness in my garage, I've got the exhaust together, got the radiator fans, got the starter cable lengthened and the A/C hose shortened, got the 3rd mount arm in, and my ECU is being done by Rudy. Is there anything else I have to really worry about? Remember, I have another XF, not the healthiest one around, but I can go without driving my coupe for a very long time, I am very patient. I think it would be wiser to hold off on such a project until I'm older, which is why I wanted to try and get stock SRT power in my N/A, which would hold me over. If you all say its impossible though, then I would just jump into the V8 swap. I'd love a 32AMG swap too. I wonder if the ECU situation would be the same though.