Engine Year????

My '79 got a used engine from the auto guys. It has the number:

105C18 or

105018

stamped on a flat area on the passenger side of the block. It is a 258 with a serpentine belt. Any one tell me what year it is. My thinking is a '83.

 

May 18, 1981
258 2bbl 8.0 to 1 comp

 

Wow cool! Do you get that by reading the number backwards?

 

Hey Jim,

I'm curious too. How the heck did you come up with that?

Thanks, by the way. Now I can get the correct parts when needed.

 

I'd tell you but then I would have to....
how to answer the question ? see below
I might add that the same codes are used for all years of 232/258 engines, although the same number doesn't mean the same year for earlier engines (clear as mud ?)
1 = 1968 for earlier 232/258 engines
since barry states it has serpentine belt, and all Calif 258 engines from 1981thru 1986 (CJ) 1988? Wrangler used serpentine belts, that's my best guess

 

You da man!

Thanks.