Last week I had some major engine issues. I dropped a valve into the cylinder and tore up my cylinder head and the block as well. Found a cheap low milage doner car on craigslist and I will be doing a swap soon. I have a 2005 Mustang 4.6 (5 speed) and will be swapping it to a 2006 Mustang 4.6 (5 speed) with a Saleen supercharger. Are there any issue that you guys think I might have? Should I swap the ECU as well? What are you guys suggestions?