Your best bet is to forget about the Rochesters and go for the Carter. The model B Rochesters have a nasty habit of warping/cracking. Just be certain that you get a Chevrolet version as the Ford version has different jetting and will run rich. Look on the side of the float bowl, if it says "Made for Motorcraft by Carter", it's a ford unit. That carter will work fine, even the original choke/throttle clamp bracket will bolt right on.
