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Old 05-13-2012, 09:18 PM   #4
C10 - C90 Bill
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Join Date: Nov 2001
Location: Moneta, VA USA
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Re: Help! Identify i6 250 I bought!

In the meantime, I checked on the Casting Numbers from the Blocks.

The 3921968 is from 1964-1976, which covers the '69 Date on the Block.

The 366855 is from 1966-1984. If all the parts on the newer engine are original, I would say that the engine is closer to 1984. I can see some kind of Date Code behind the dipstick on the newer engine, but it is not real clear to me. I see what could be an 8 or 9 (possibly '78 or '79).

Bill
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