Engine oil pan rail numbers decoder help?

[Rusty]

Anyone out there have the magic decoder for this 71 426 Hemi engine on the numbers on the oil pan rail?

 

[MarPar]

IIRC the diamond means oversize tappets.

just going by memory though...

 

[Rusty]

here is what I know thus far - correct me if I am wrong
NM4263570121442
NM/426/3570/121442

I think NM should of been MN and was stamped wrong - MN=Maryville Plant
426 = easy, 426
3570 = 10000 day calendar for May 7th 1971
Diamond = oversized tappets

any idea what the 121442 is?

 

[ArtH]

Could the last six digits be the serial number part of the VIN matching it to the car it came in?

Lots of info here: http://www.moparts.org/Tech/Archive/motor/36.html

 

[Rusty]

no - the Vin is RM23R1G219753

- - - Updated - - -

according to the link you sent 121442 is the serial number - A sequential number for each days
production beginning with 0001