Looks like it might have later truck peanut port heads on it. The 12 point timing chain cover bolts tell me that someone has been in it before.

I'm betting it's a cop car engine.

In the past week i was doing some various COPO searches and on one hit a guy had some old documents pertaining to COPO codes. Said most all were auto fleet , truck and truck fleet oriented - as others have already stated.

Point being - if i can find that hit again - maybe can link you to that poster on that website. It was one of the 3 main Camaro based sites , iirc.
9627 holds your answer.

Most likely a 4 door taxi , station wagon taxi , station wagon hearse or ambulance conversion .... that type of thing. Since its listed with full-size car codes.

Hey 964Impala , sending you a PM with contact source to a member on this site who has the 1967-1974 GM COPO Catalogue. Hopefully he can assist you with the 9627 code.

Let us know if you find out anything. :biggthumpup:

Back in the early 70's, my brother spun the bearings on the 396 in his 69 SS Chevelle. He went to an engine exchange in Cleveland and bought a 427 out of a wrecked 68 Chevrolet Cleveland Police car. I just checked with him and it had an IS code on it. I've also seen multiple times where Tonawanda used a number in place of a letter, so I'm betting your I5 is an IS engine. By the way, it was a two bolt main car that he couldn't destroy. He and the next three owners tried, but that engine never failed.

Phil W.

Cool story Woj - the fact that your brother remembers the engine code from 40+ years ago......priceless!!