I had an engine fire in my camaro so I went ahead and did a whole bunch of crap too it. When I was disconnecting the harness from the ECM and I dropped the ECM I noticed the service # had been ripped off, all thats left of it is "122" which really doesn't help. I do however have another camaro ECM that reads "1227169", should I put that one in or leave in the mysterious one?

I believe the previous engine was an LG4, I'll check the VIN when I get a can of compressed air. The bastard that owned the car before me somehow managed to drop a business card over half of it.

Also, anyone know what year the "1227169" would have came off of?

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My 86' Monte SS has (had) that one. It was the L69, not sure if they used it on the LG4 or not. The link above should narrow that down for you.