on the block right next to the tranny south west of the headers, the engine code should be there
look on the pic it's right next to the barcode
http://images.search.yahoo.com/images/view?back=http%3A%2F%2Fimages.search.yahoo.com%2Fsearch%2Fimages%3Fp%3Dhonda%2Bd16%2Bengine%26ei%3Dutf-8%26fr%3Dyfp-t-101%26fr2%3Dsg-gac&w=500&h=375&imgurl=static.flickr.com%2F3469%2F3316310030_dd3ea3c0f7.jpg&rurl=http%3A%2F%2Fwww.flickr.com%2Fphotos%2F28069202%40N05%2F3316310030%2F&size=166k&name=d16+engine+swap+...&p=honda+d16+engine&oid=1aeaa8b41744ced0&fr2=sg-gac&fusr=delphi.jack&no=3&tt=88&sigr=11l6blt18&sigi=11gg3u5qv&sigb=130bugl6p
it should read D16 or D15