killamikes97gt

hey guys hoping someone can help me i have a 1996 mustang saleen clone automatic ratchet tranny setupwas originally a 1996 mustang gt, well lets get to the point my computer burned out, and my car is pretty heavily modified i have 1999 pi windsor heads cams, supercharged, etc if i put another 1996 mustang gt computer will it be ok i know i need to get it retuned, and i also keep hering an issue with i will need to get the car re-keyed to work with the new computer please help need advice and also does it matter if the computer codes match as long as its another automatic like my computer code is F6ZF/12A650/ND any advice would be appreciated thank you