I did see that Tim. As you said in a post I also saw, early 235 carbs fit 216. So that fact and the fact that 235 and 261 fit each other, and the fact that their carb sections interchange, makes B1 carbs a real challenge to identify and I now give up. Measurements and a base number is all we have. Other numbers are cast numbers and may not be traceable. If the carb fits, wear it. Users have been mixing and matching these carbs in many iterations, over and over, for many years and are rolling along. Gas mileage be damned. Who knows what you are buying on Ebay, Swap Meet or CL unless super educated.
Snowman: You should have enough info now to fix and play trucks. Just don't do the RTV thing. And check for "Captains Bars"
