Am looking to do this and had a few questions. Want to start with buying engine and trans used. Heard mustang engine is better 2013 or newer I think. On eBay u can buy pull outs engine trans and harnes and computer. But I need a 4x4 trans out of an f-150. Is the mustang engine that much better? Will the computer and harnes in a mustang control the f-150 6r80? I'm just trying to make sure I buy the right stuff. Thanks for the help