Just wondering if I can just put the '95 computer in my '94 car without any issues, or do I have to reflash the computer to get it to work?

 

If it's an MM6 car it should work fine, as far as I know (but I haven't actually tried it since I don't own an MM6 car). If it's an A4, you need to disable the torque converter PWM diagnostic or you will get an error code. I am running 1995 code in my 1994 Impala (with the PWM code disabled).

 

It is an M6 computer.