95 bonneville computer problems

Alright I took my 95 bonneville ssei into the auto mechanic awhile ago and they came back and said that the computer on the car was bad and needed replaced. So I took the computer off of a 94 bonneville and it looked exactly the same as the 95 and put it in and it started right up. Now i havent drove it a lot in the past week, but i was just wondering if it was alright for me to do that.
Thanks, Nate

Did you install the prom (chip) from the 95 in the 94 PCM. If so, it should be fine!