Just trying to figure out the origin of the 383 thats going into my Duster.

LL24681307 on both sides
5/17/67
On underside of drivers side block facing ground=
PT383P235174 and a faint 9 (maybe?)
Not sure is thats associated with a vin or maybe a DCPD replacement block. Cant find any other markings.

I was told it came from a big block A body.