I was planning to do a V8 swap in my crossfire but have been quoted from 10k with me doing everything but the computer to 20k for a hands off turn key swap. I want the SL55AMG engine but I'm starting to wonder if I should just buy the blasted Merecedes. If you have a crossfire with a swap, why didn't you take that route? Preowned SL55 AMG's can be had for the price of the swap.