3197 comes out to 4/29/1970 are you sure the date on the block is 1/8/1970 not 4/8/1970. what is the date on the door tag?? There is also a vin stamped into the package tray. Also do you have the fender tag??
The date on the door tag is 5-70 ... I'm pretty sure it was 1.8.1970, but I will double check in the morning... I will also check the package tray #...
Just as an aside, I'm "pretty" positive that the block is original to the car.. I bought this Duster in 1978 from the second owner, and had the engine re-built in 1980, and it's never left my sight for very long... I'm just trying to document the car as a true matching #'s Duster 340, again which I'm pretty sure it is, but then again "close enough" only counts with hand grenades, right?