I have a 3955270 COPO MN engine cast I-4-8 which I think translates into Sept 4, 1968.
Block was stamped T0122MN and was installed around second week of April.
I think the VIN is N639383, but it is hard to tell if the threes are eights.
I think I read in someones book, they say all COPO's had '512 blocks. Well, here is the exception. Goes to show anything is possible.
- Warren
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