I have added the Carburetor in Relation To Service – How to Overhaul a Marvel Carburetor by the Marvel Carburetor Company. This is a very complete and clear manual describing how the Marvel carburetor works and how it is rebuilt. The data covers all the splithead era Pontiacs that used Marvel carburetors.
Additionally uploaded was the Calibration Chart which shows essential data for each year Pontiac and which Marvel carburetor was used. It also show additional information needed to rebuild and maintain these carburetors. When you open this chart you will likely have to zoom in to see the specific carburetor you are looking at.
This information can be found in the menu:
Reference-> Misc Reference->Marvel Carburetion Manual
Reference-> Misc Reference-> Marvel Carburetor Calibration Chart
Let me know if you have any problems accessing this information.
Let’s keep the splithead Pontiacs on the road!
pontiacsplithead.com 
Did the split head 6 motor have different water pumps. We have a 32 model 402. The waterpump is missing. It looks like there are 5 bolt holes. Everything I’m seeing shows a 3 bolt pump. I also have a 1931 split 6 which has 3 holes. Thanks
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The 1932 pump was ’32 only. The reason is that they added a water distribution tube that sent water to the back head for better cooling. The ’32 has 4 bolts and is larger than the earlier pumps. However, some of the other parts such as bushings, shaft and impeller are shared with some earlier engines.
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