Finding engine numbers info

Captainkirk said

Exactly!
The stampings on the block that came with the car are: 2780980340-6. It was cast in 10 of 69

I also have the complete info from the fender tag, as follows:
EN2
N23 N42 R11 V68 V88
GA4 I B51 C56 J52
GA4 C6X9 TX9 616 E37558
E55 D21 VS29 H2B 504(***)

Click to expand...

So it is a factory 72 340 Duster but the date code of the block really does not matter, the VIN number stamped on the passenger side of the block above the oil pan rail and the assembly date on the drivers side front right under where the head bolts has the information we need to determine if it is the original block or not...