Without getting your underwear in a bunch...

"Ok, Newbie" means, why spend approx. $20,000 on a used Crossfire plus $50,000 on an AMG engine when you could take that same money and buy a brand new Z06 Corvette and be a hell of lot faster (and resale value added).

PS - I didn't even take into account the Computer problems with the engine transplant for the Crossfire. Please take no offense... we've ALL been looking for a way to "Hot rod this car" HDDP has been real nice in his response... could have been devastating. LOL. With respect HDDP.
Good luck.