99 header on a 2k G

Ok heres the deal, I have found a realy good deal on a HS header but it is made for the 99 sr20 but from what I have heard the only difference between the 99 and 2k headers are an extra O2 sensor in the 2k model. So my question is if I get this header will I be able to just put in a new bung for the extra O2 sensor and bolt it up or is there anything else I should be worried about. Please help answer soon because the deal won't be around for long.
Thanks.

Any one?