How can I tell what year Integra this motor this is from besides the vin# ??? Anything on the block or head that I can tell the diffrence from? Thanks for the help

B18A1 90-91 Acura Integra LS- RS- GS, OBDO
B18A1 92-93 Acura Integra LS- RS- GS, OBD I

I just want to know just because I dont know what OBD it is!!!

If so is there a vin number on the engines and where is it located??