I have a stupid question, I was hit with.

I have a stupid question, I was hit with hurricane Sandy which flooed my 2005 Mustang, while I know the car will never be 100 perfect again I would like to save it as a station car. I changed the oil and was able to start the car but all the lights go on and the dash board is blinking. I am pretty handy, and can clean out most of the connections but my big issue is do I automatically assume I need to replace the Computer? ANy thought about this would be great, it is a shame to just junk this car.
Thanks