Re: Fuel pump push rod
The service bulletins show two different heights for the intake manifold fuel pump adapter mounting surface. Also the 35-36 club restoration book shows the same. The mounting surface height changed in 35. Both the 33 and 34 engines with their intake manifolds took the same fuel pump push rod. The green chassis parts book from 1950 is very clear with lengths and usage for the various part numbers.
48-9400-A is 8.872" and used on cast iron covers
48-9400-B is 7.872" and used on aluminum covers
The early chassis parts book from 34 do show 40-9400 but it appears this part number went obsolete between 35 to 36 and replaced by 48-9400-B
So i went to my 34 engine and installed the 33 intake manifold and all the info above is correct the 48-9400-B=7.872" long is the proper fuel pump push rod. The same rod is used with the 34 intake, both have the 2.31" tall fuel pump adapter mount surface.
Do remember the engine blocks changed from 34 to 35.
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