Identifying a S15 SR20DE

[RHDRPS13]

I know the S14 and S15 DE's look identical, but does anyone know the head or block code for a S15 SR20DE? A friend is selling what he says is a S15 SR20DE swap with a 5-speed trans for cheap, I just want to make sure I'm getting an S15 engine. I've tried searching, but all I could find was info about FWD SRs

[Sileighty_85]

If its running the S15 ECU, Get the part Number off of it and I can look it up

[xiaphin]

Something tells me this is RHD180sx over at Carolina nissans. Hope its the S15 engine!!