You could order a Firebird with a two barrel with the 350 and 400cid engines. If really interested fax the vin to PHS and pay the extra 10 bucks to get fax back service to verify, usually same day turn around. I have a build sheet for a 69 400 2bbl firebird that I found under the carpet in a 69 400 4bbl Firebird I used to own. It was on top of my cars buildsheet. PM me and I will scan and e-mail it to you if interested.