alright well i gota 2000 gt my sohc 4.6l just took a ****...so i want to throw in a dohc 4.6l (cobra or mach one) does anyone know if there will have to be flashing of the ecm, willmy tranny bolt right up?? (T45), will the exhaust manifolds bolt right up or what? also on craigslist i seen an 04 cobra engine, anyone know if that'll work more or less without changing too much?

 

from what I've been told you have to change the harness and the ecm also.