Mopar #'s Matching

I might add in '68 ( not sure what month) they began to use the build sequence number not vin. The vin started being used on eng/trans in '69. The 273 will be physically the same as the 273. There are other oddities to make it look like a 273 though.
I bet the vin will tell if a car was a 273 2 bbl or 4 bbl car??