I would highly recommend swapping to one of the newer 2 bbl carbs available from Langdon's Stovebolt for a good price. Either the Holley/Webber or the Carter/Webber. I just put one on my '52 and it has never run so good.
However, if you want to stick with the Rochester, I can send you my old Rochester 1bbl. If interested, e-mail me.