My car is in the shop and my mechanic says the computer is toast (check engine light, no response when trying to run codes). He's been trying to track down a computer, but says that he is looking for a specific ten-digit number for the correct computer. I thought an A9L was an A9L. It's a '90 with a '91 engine transplant. What's the deal? The weather is getting nice and i want my restoration project on the road. Thanks.