Thanks in advance, the carburetor that was on my 1960 Buick Electra when I got it was (and is) a 4-barrel Rochester and it has the little aluminum triangle tag that says 7015040, but the carburetor is a Quadrajet which is leading me to believe that the 7015040 tag is not correct because it is my understanding that the Quadrajet was issued later.. I still run the original 401 nailhead so any guesses as to what reb I should get?