got a block but not sure what it is

ok i got a block with a b18c code. the guy that sold it to me told me it was a gsr jdm. i always though that a b18c was a typer jdm. can b18c also be a gsr or is it only a typer.
thanks

It could be either.

both jdm gsr and type-r motors have the b-18c stamp

B18C1 is GSR in USA
B18C5 is Type-R in USA

Do not know the diff between USA & Jap codes

ahh. i c. and the pistons have a p72 stamp. witch i guess is gsr?

correct

and i think thats usdm on top of that! the p72 AO