Spark control computer under dash

Has anyone ever seen a spark control computer like this one? Usually the ESA/ELB computers were mounted on the side of the air cleaner, but in my '81 Gran Fury police car the computer is mounted under the dash on the driver's side near the parking brake. It seems like a really good idea, getting it out of the engine bay and into the air-conditioned, protected interior. Never seen another one like it though, which is odd seeing as it is a drastic improvement. The computer actually still works...

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